Breath of Sloth WW
Emchantment - Aura
Enchant creature
Manifold 3(You may choose any number of additional targets for this aura and pay its manifold cost for each target beyond the first. As this Aura enters the battlefield, it enchants any of those permanents and put tokens that are copies of it onto the battlefield enchanting the others.)
Enchanted creature can't attack or block.
Wake the Earth GW
Enchantment - Aura
Enchant land
Manifold GW
Enchanted land has indestructible and can't be enchanted by other Auras.
At the beginning of your upkeep, you may have enchanted land become a 2/2 creature until end of turn. It's still a land.
Color pie suggestions: Focused mostly on helpful auras for white and green with a minor in red, mostly harmful auras in black and a minor in red, and blue can probably do a little of each.
Crafty Mongoose G
Creature - Mongoose
Guile 1 (When this creature becomes blocked, exile 1 card from the top of defending player's library. If that card is a creature card, put a +1/+1 counter on this creature.)
When Crafty Mongoose guiles into a creature, regenerate it.
When Crafty Mongoose guiles into a noncreature, nonland card, it gains deathtouch until end of turn.
1/1
Sneaky Snakeskin 3B
Creature - Snake Zombie
Guile 2 (When this creature becomes blocked, exile 3 cards from the top of defending player's library. Put a +1/+1 counter on this creature for each creature card exiled in this way.)
When Sneaky Snakeskin attacks and isn't blocked, you may remove it from combat. If you do, draw a card and defending player discards a card.
2/2
Faceshaper 3UU
Creature - Shapeshifter
Guile 5
When Faceshaper guiles into a creature card, you may have it become a copy of that creature card except it gains this ability and Guile 5.
5/2
Shady Oak 6G
Creature - Treefolk Rogue
Guile 7 2G, Sacrifice a Forest: Shady Oak must be blocked this turn if able.
5/5
Concepted as a GUB mechanic.
Ash Tree Valley
Land
Ash Tree Valley enters the battlefield tapped.
When Ash Tree Valley enters the battlefield, draw a card, then discard a card. If you discard a Mountain or a Forest in this way, untap Ash Tree Valley. T: Add R or G to your mana pool.
Possible dual idea. Might be too good. Intended to be better for the late game. I'm sure older formats would appreciate easy discard though.
Aggrandize (At the beginning of your upkeep, create a token that's a copy of this Aura enchanting the same permanent/player. Tokens can't have or gain Aggrandize.)
Mane of Flame R
Enchantment - Aura (C)
Enchant creature
Enchanted creature gets +1/+0.
Aggrandize.
Scaleskin 1G
Enchantment - Aura (C)
Enchant creature
When Scaleskin enters the battlefield, put a +1/+1 counter on enchanted creature.
Sacrifice Scaleskin: Regenerate enchanted creature.
Aggrandize.
Champion of Lions 2GW
Enchantment - Aura (U)
Enchant creature
Enchanted creature gets +1/+1 for each Aura enchanting it.
Aggrandize.
Exceptionalism RW
Enchantment - Aura (R)
Enchant creature
Enchanted creature gets +1/+1.
As Exceptionalism enters the battlefield, choose first strike, lifelink, or vigilance. Enchanted creature gains that ability. If it already has those abilities, you may choose double strike, indestructible, or menace instead. If it already has those abilities, you may choose protection from blue, protection from black, or protection from green instead.
Aggrandize.
Oppressive Tax 1W
Enchantment - Aura (U)
Enchant nonland permanent
When Oppressive Tax enters the battlefield or at the beginning of your upkeep, exile enchanted permanent unless its controller pays 1.
Aggrandize.
Spectral Rush 1BR
Enchantment - Aura (R)
Enchant creature
Enchanted creature has menace and haste.
Whenever enchanted creature deals combat damage to a player, that player discards a card. If that card is a nonland, noncreature card ~ deals 3 damage to that player.
Aggrandize.
Luscious Development 3GU
Enchantment - Aura (U)
Enchant land
When Luscious Development enters the battlefield, draw a card.
Whenever enchanted land is tapped for mana, add two mana in any combination of colors to your mana pool.
Aggrandize.
@Apoquallyp
I'll split it up into two phrases for easy reading.
At the beginning of your upkeep, you may cast this card from your graveyard this turn for its mana cost.
At the beginning of your upkeep, exile this card from your graveyard unless you pay its memoriam cost.
So if you want to keep it in your graveyard, you have to pay. If you don't it is exiled. If you do it remains in your graveyard. You are not obliged to cast it that turn. You can keep paying for the luxury of casting it on a later turn. The abilities are tied together and share the same trigger so effects that allow cards to be cast at instant speed won't allow you to cast it before paying the memoriam cost. I find your wording more confusing just as a matter of parsing; it seems to imply if you don't cast the spell it's exiled.
More:
Scummy Filthdiggers 1R
Creature - Human Rogue (U)
When Scummy Filthdiggers dies, each player shuffles a card from his or her hand into his or her library, then draws a card.
Memoriam - 1G
When Scummy Filthdiggers enters the battlefield, if you cast it from your graveyard, put two target cards in a single graveyard on the bottom of their owner's library.
2/1
Unburied General 3BB
Creature - Zombie Soldier (R?)
Lifelink
Memoriam - WW
When Unburied General enters the battlefield, if you cast it from your graveyard, put a +1/+1 counter on each creature you control and those creatures gain lifelink until end of turn.
3/5
Walking Wallet 6
Artifact Creature - Construct (M)
Defender
Walking Wallet enters the battlefield with four +1/+1 counters on it
Whenever Walking Wallet blocks or becomes blocked, remove a +1/+1 counter from it create two artifact tokens named Gold with, "Sacrifice this artifact: Add one mana of any color to your mana pool."
Memoriam - GU
When Walking Wallet enters the battlefield, if you cast it from your graveyard, put two additional +1/+1 counters on it and it loses defender.
0/0
Bladegripper 2W
Creature - Human Soldier (R)
Memoriam - Tap an untapped equipment you control and pay its equip cost.
When Bladegripper enters the battlefield, if you cast it from your graveyard, tap it and attach target tapped equipment to it.
2/2
Fearless Goonsquad 4R
Creature - Human Berserker (U)
Haste
At the beginning of your end step, if ~ is untapped, it fights target creature an opponent controls.
Memoriam 1B
When ~ enters the battlefield, if you cast it from your graveyard, it gets +3/+0 until end of turn and regenerate it.
4/1
Oldriver Druid 2G
Creature - Elf Druid (U)
When ~ dies, return up to two target land cards in your graveyard to the battlefield tapped. They don't untap during your next untap step.
Memoriam - U, Sacrifice an Island
When ~ enters the battlefield, if you cast it from your graveyard, draw two cards then discard a card.
1/3
@v_n: I'm not back exactly. I've quit magic and I'm selling my extensive collection. However, I was bored and this mechanic has been swirling around my head for years.
@user: I wanted a white Pacifism effect that wasn't too annoying to recur. I based it off Shackles. I figured that 3 mana up front and 5 mana every turn thereafter was a sufficient disincentive to play the card too often.
@Lucan: I like the parasitic ideas. The tomb was an attempt, although I suppose it's pretty slow.
Bride of Arteries 3B
Creature - Vampire
Flying, lifelink
At the beginning of each opponent's upkeep, that player may pay 3 life. If that player does, sacrifice Bride of Arteries and you gain 3 life.
Memoriam 1B
3/3
Tonbones 8B
Creature - Skeleton Giant
Tonbones costs X less to cast where X is the total converted mana cost of creature cards exiled from your graveyard this turn.
Memoriam - Exile a creature card from your graveyard.
8/1
This is somewhat parasitic in that other creature memoriam cards can feed it.
Potent Poltergeist 4UU
Creature - Spirit Artificer
~ can't be blocked as long as defending player controls an artifact.
Memoriam - Tap two untapped artifacts you control.
As long as ~ is in your graveyard, artifacts you control have hexproof and, "2, Exile a card from your graveyard: Untap this artifact. Activate this ability only once each turn."
3/3
Glottal Plosive 1R
Sorcery
~ deals 3 damage to target creature. If you cast ~ from your graveyard, it deals 6 damage to that creature instead and it deals 3 damage to you.
Memoriam 2RR
Memoriam - COST (At the beginning of your upkeep, exile this card from your graveyard unless you pay its memoriam cost. Until end of turn, you may cast this card from your graveyard for it's mana cost.)
Priest of White Ash 1W
Creature - Human Cleric (U)
When Priest of White Ash enters the battlefield, exile up to three target cards from a single graveyard until Priest of White Ash leaves the battlefield.
Memoriam - W
1/3
Captain of Valorhelm WW
Creature - Human Soldier (C)
When Captain of Valorhelm enters the battlefield, tap or untap target creature.
Memoriam - Tap an untapped white creature you control.
2/2
Days of Mourning 1W
Enchantment - Aura (C)
Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
When a creature dies, tap enchanted creature.
Memoriam - 1W
Featherbraid Angel 3WW
Creature - Angel (M)
Flying
When Featherbraid Angel dies, create two 1/1 white Bird creature tokens with flying.
Memoriam - Tap two untapped white creatures you control.
When Featherbraid Angel is exiled from your graveyard, tap all creatures you control.
4/4
Diviner of Miseries 3U
Creature - Human Wizard
When Diviner of Miseries enters the battlefield, target player puts the top four cards of his or her library into his or her graveyard.
Memoriam - 1U
When Diviner of Miseries is exiled from your graveyard, put the top four cards of your library into your graveyard.
1/4
Serpent of Glowing AEther 3UU
Creature - Serpent Illusion (R)
When Serpent of Glowing AEther enters the battlefield, look at the top four cards of your library. You may reveal an instant or sorcery card from among them, put it into your hand, then put the rest on the bottom of your library in any order.
When Serpent of Glowing AEther becomes the target of a spell or ability, sacrifice it.
Memoriam - Exile an instant or sorcery card from your graveyard.
5/5
Whispering Yesterdays 2U
Sorcery (C)
Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Memoriam - 2U
When Whispering Yesterdays is exiled from your graveyard, exile two cards from your graveyard.
Morrowbond Sphinx 5UU
Creature - Sphinx (M)
Flying
When Morrowbond Sphinx dies, exile two cards from your graveyard. If you do, take an extra turn after this one.
Memoriam - 1UU
When Morrobond Sphinx is exiled from your graveyard, skip your next turn.
5/4
Omnipresent Roaches 1BB
Creature - Insect (U)
Deathtouch
Memoriam - Pay 1 life
When Omnipresent Roaches is exiled from your graveyard, you lose life equal to the number of cards in your graveyard.
1/1
Screaming Skull 1B
Creature - Skeleton (R)
Menace
Screaming Skull attacks if able.
When Screaming Skull attacks and isn't blocked, defending player loses 1 life, then you lose 1 life and draw a card.
Memoriam B
0/1
Gravebuster Ogre 4B
Creature - Ogre Zombie (C)
When you cast Gravebuster Ogre from your graveyard, return target creature card from your graveyard to your hand.
Memoriam - 1B
4/4
Master of Fealty 3BBB
Creature - Vampire (?)
Flying
When Master of Fealty enters the battlefield, gain control of target tapped creature. You may untap that creature. If you do, lose life equal to its power.
Memoriam - Sacrifice a creature
5/5
Pillaging Marauders 1RR
Creature - Human Berserker (C)
Haste
Pillaging Marauders attacks if able.
When Pillaging Marauders dies, it deals 3 damage to target opponent.
Memoriam - Sacrifice a land
3/1
Rumblestone Giant 4RRRR
Creature - Giant (M)
Rumblestone Giant costs 1R less to cast for each land put into a graveyard from the battlefield this turn.
Haste
Memoriam - Sacrifice two lands.
8/8
Rustwhisker Ouphe 2G
Creature - Ouphe T, Sacrifice Rustwhisker Ouphe: Destroy target artifact. G, T, Sacrifice an artifact: Exile target artifact.
Memoriam - Exile an artifact card from your graveyard.
2/2
Gathering Grains 1GG
Sorcery
Search your library for a basic Forest or Plains card, put it onto the battlefield tapped, then shuffle your library.
Memoriam GG
Tomb of Heroes' Bones 3
Artifact
Tomb of Heroes' Bones enters the battlefield tapped and doesn't untap during your untap step.
When a creature card is exiled from your graveyard, untap Tomb of Heroes' Bones. T, Sacrifice Tomb of Heroes' Bones: Add CCC to your mana pool.
Memoriam 3
Mox Tigerseye 0
Artifact
When Mox Tigerseye enters the battlefield, sacrifice an artifact. T: Add R to your mana pool. It wanders from pocket to pocket and purse to purse, with only a few seeing a glint of its true potency.
Geode of Prophecies 2
Artifact T: Add C to your mana pool.
When ~ is put into a graveyard from the battlefield, scry 3.
Warping Stones 4
Artifact T: Add CC to your mana pool. 4, T, Sacrifice an artifact: Put a token that's a copy of Warping Stones onto the battlefield tapped.
Pebble of Ita 1
Artifact T: Add one mana of any color to your mana pool.
At the beginning of your upkeep, sacrifice Pebble of Ita unless you pay 1. A once grand city, Ita was destroyed over five generations at the order of Oltho Rex, the Undying King.
Monument to Oltho 9
Artifact T: Add CCCCCC to your mana pool. 9: Monument to Oltho becomes a 9/9 Giant Construct creature until end of turn.
Mana Gravel 3
Artifact T: Add one mana of any color to your mana pool. 4, T, Sacrifice two lands and Mana Gravel: Search your library for up to five basic land cards that don't share any land types, put them onto the battlefield tapped, then shuffle your library.
Poison-Barbed Ring 2
Artifact
Poison-Barbed Ring enters the battlefield tapped. T: Add C to your mana pool. 2, T, Sacrifice Poison-Barbed Ring: Destroy target attacking creature with power two or less.
Island of Diamond 3
Artifact 0: Island of Diamond becomes an Island land until end of turn. It's still an artifact. (It has, "T: Add U to your mana pool.")
Aura Piercing BG
Sorcery
Destroy target enchantment. If it's enchanting a creature, destroy that creature. "A heart on one's sleeve is easily pierced."
Slug of Guilt 2B
Creature - Slug
At the beginning of your upkeep, exile the top three cards of your library face-down.
When Slug of Guilt dies, look at the cards exiled by it and choose one. Put that card into your hand. You lose life equal to the number of cards still in exile.
1/1
Fisherman's Foe 5UU
Creature - Whale Leviathan
Fisherman's Foe is white.
Whenever Fisherman's Foe attacks, exile all blue creatures. Return them to the battlefield under their owner's control at the beginning of the next end step.
8/8
Fanatical Sailor 3WU
Creature - Human Pirate
When Fanatical Sailor enters the battlefield, search your library for a white Whale and put it onto the battlefield under target opponent's control. If you do, put five 1/1 blue Human creature tokens onto the battlefield.
Whenever a Whale attacks, put four 1/1 white Human creature tokens onto the battlefield. 2WU, T, Tap five untapped creatures you control: Tap target Whale. Gain control of that creature until the end of your next turn. Fanatical Sailor doesn't untap during your next untap step.
2/2
Gate of Iron and Gold 3
Artifact 3, T, Sacrifice a land: Reveal the top five cards of your library. Put up to two land cards revealed in this way onto the battlefield tapped. Put the rest on the bottom of your library in a random order.
Filament Spores G
Enchantment - Aura
Enchant creature
When Filament Spores enters the battlefield, scry 1.
Whenever enchanted creature becomes tapped, sacrifice Filament Spores and prevent all damage that would be dealt by enchanted creature this turn. Enchanted creature doesn't untap during it's controller's next untap step.
Big-Club Commander 5RR
Creature - Ogre Warrior
Haste
When ~ enters the battlefield, each player puts a 1/1 red Goblin creature token with haste onto the battlefield for each creature he or she controls that attacked this turn. After this phase, there is an additional combat phase followed by an additional main phase.
4/4
Miasma of Frost 4UU
Enchantment - Aura
Enchant creature
When Miasma of Frost, tap enchanted creature and up to three other target creatures.
Enchanted creature doesn't untap during its controller's untap step.
Hail and Thunder URR
Instant
Strive - Hail and Thunder costs 1 more to cast for each target beyond the first.
Tap any number of target creatures.
Hail and Thunder deals 2 damage to each of any number of target creatures for each creature tapped in this way.
Teleport Mishap 3U
Sorcery
Exile target nontoken creature you control. Put two tokens that are copies of it onto the battlefield.
Destination Not Found 5W
Sorcery
Exile up to two target nontoken creatures until a player casts a spell named Teleport Mishap. When they return to the battlefield, those creatures become Replicants in addition to their creature types and have, "At the beginning of your end step, if a player has both Teleportation Mishap and Destination Not Found in his or her graveyard, that player exiles them, melds them and sets the scheme in motion."
Interplanar Invasion
Ongoing Scheme
When you set this scheme in motion and at the beginning of each end step, put a token that's a copy of a Replicant or a token creature onto the battlefield.
At the beginning of your upkeep, if you control no Replicants or token creatures, abandon this scheme into exile.
I am aware of the memory issue. I'm posting it for help.
Forlorn Whimper B
Sorcery
Target opponent loses 2 life. Exile a creature card from your graveyard. If you do, return Forlorn Whimper from your graveyard to your hand at the beginning of the next end step.
Blessed Memory 3W
Instant
Exile up to three target creature cards from graveyards. For each card exiled in this way, put a 1/1 white Spirit creature token with flying onto the battlefield.
Small Fry 2R
Sorcery
Choose one
-Small Fry deals 1 damage to each of three target creatures.
-Small Fry deals 2 damage to one target creature and 1 damage to another target creature.
-Small Fry deals 6 damage to target creature with power 2 or less.
Edit: Added a third mode.
Serpentus Interruptus 2G
Creature - Snake
Flash
When ~ enters the battlefield creature spells can't be countered this turn. Serpentus Interruptus gains deathtouch until end of turn.
2/2
Summoner's Flattery 2U
Instant
Counter target creature spell. Scry 1. You may reveal the top card of your library. If that card is a creature card, put a 0/3 blue Illusion creature token onto the battlefield. If that card has the same name as the countered spell, you may put it onto the battlefield.
Return in Memory 3W
Instant
Until end of turn, whenever a creature you control is exiled from the battlefield, put a token that's a copy of that creature onto the battlefield. That creature is a Reflection in addition to its creature types and has, "At the beginning of your upkeep, if you control a nonReflection creature with the same name as this creature, sacrifice this creature."
My intent was to make a card that would prevent Swords to Plowshares from working. This does more or less what I want without getting into apparently messy returning from exile territory.
I could make it cheaper at 1W and make it single target.
Collected Screams 2BB
Enchantment
When Collected Screams enters the battlefield, each creature gets -2/-2 until end of turn.
Whenever a creature dies, put a scream counter on Collected Screams. 4BB, Sacrifice Collected Screams: Put a 2/2 black Zombie creature token onto the battlefield for each scream counter on Collected Screams.
Drop onto Rocks 3R
Instant - Trap
You may pay 1W rather than pay Drop onto Rocks' mana cost if you control a creature with flying. If you do, Drop onto Rocks can't target a creature with power greater than that creature's power.
Drop onto Rocks deals 2 damage to target attacking creature without flying. When that creature becomes blocked this turn, destroy it.
Scathing Retort 2R
Instant
Scathing Retort deals X damage to target noncreature spell's controller, where X is 2 plus that spell's converted mana cost.
Rescue from Eternity 3W
Instant
Exile target nontoken creature you own. At the beginning of the next end step, return that card and another creature card you own exiled from the battlefield this turn to the battlefield tapped.
Exile Rescue from Eternity.
Fish for a Day U
Instant
Target creature loses all abilities and becomes a base power and toughness 3/4 blue Fish until end of turn.
Joplain, the Artist 2GW
Legendary Creature - Human
When Joplain, the Artist enters the battlefield, search your library for an enchantment card, put it onto the battlefield with a paint counter on it, then shuffle your library.
When Joplain or a permanent with a paint counter on it leaves the battlefield, return Joplain and all permanents with any paint counters still on the battlefield to their owners' hands.
2/3
Antelope Grove
Land T: Put a 0/1 white Antelope creature token onto the battlefield. It can't attack or block for as long as you control a permanent named Antelope Grove. T, Sacrifice an Antelope and Antelope Grove: Add GG, GW, or WW to your mana pool. You gain 2 life. (Bonus: Plus an additional 1 or 2 life for each Antelope you control.)
Alternate...
Antelope Grove
Land T: Put a 0/1 white Antelope creature token onto the battlefield. It can't attack or block as long as you control a permanent named Antelope Grove T, Sacrifice an Antelope and Antelope Grove: Add any combination of X green and or white mana to your mana pool, where X is two plus the number of Antelopes you control. You gain that much life.
Lots of variables here.
Alternatives include as before but can only produce a token as a sorcery.
I think 2 is the best number for Embers. I was thinking of a card like this...
Forging Ritual R
Sorcery
Add RRR to your mana pool. Forging Ritual deals 3 damage to you.
It's a "fair" card and could have been printed a while ago, but it would probably do something busted in older formats where the drawback is probably a positive.
Hooting Gibbons 3G
Creature - Ape
Flash
When Hooting Gibbons enters the battlefield, destroy target artifact an opponent controls.
2/2
Antelope Grove
Land
Antelopes can't attack or block as long as Antelope Grove is tapped.
T: Put a 0/1 white Antelope creature token onto the battlefield.
T, Sacrifice an Antelope: Add G or W to your mana pool. You gain 1 life.
Smouldering Coals R
Sorcery
Add RR to your mana pool. Smouldering Coals deals 2 damage to you.
At the beginning of your precombat main phase, if Smouldering Coals is in your graveyard, exile it and copy it. Cast the copy without paying its mana cost.
Breath of Sloth WW
Emchantment - Aura
Enchant creature
Manifold 3 (You may choose any number of additional targets for this aura and pay its manifold cost for each target beyond the first. As this Aura enters the battlefield, it enchants any of those permanents and put tokens that are copies of it onto the battlefield enchanting the others.)
Enchanted creature can't attack or block.
Wake the Earth GW
Enchantment - Aura
Enchant land
Manifold GW
Enchanted land has indestructible and can't be enchanted by other Auras.
At the beginning of your upkeep, you may have enchanted land become a 2/2 creature until end of turn. It's still a land.
Color pie suggestions: Focused mostly on helpful auras for white and green with a minor in red, mostly harmful auras in black and a minor in red, and blue can probably do a little of each.
Crafty Mongoose G
Creature - Mongoose
Guile 1 (When this creature becomes blocked, exile 1 card from the top of defending player's library. If that card is a creature card, put a +1/+1 counter on this creature.)
When Crafty Mongoose guiles into a creature, regenerate it.
When Crafty Mongoose guiles into a noncreature, nonland card, it gains deathtouch until end of turn.
1/1
Sneaky Snakeskin 3B
Creature - Snake Zombie
Guile 2 (When this creature becomes blocked, exile 3 cards from the top of defending player's library. Put a +1/+1 counter on this creature for each creature card exiled in this way.)
When Sneaky Snakeskin attacks and isn't blocked, you may remove it from combat. If you do, draw a card and defending player discards a card.
2/2
Faceshaper 3UU
Creature - Shapeshifter
Guile 5
When Faceshaper guiles into a creature card, you may have it become a copy of that creature card except it gains this ability and Guile 5.
5/2
Shady Oak 6G
Creature - Treefolk Rogue
Guile 7
2G, Sacrifice a Forest: Shady Oak must be blocked this turn if able.
5/5
Concepted as a GUB mechanic.
Ash Tree Valley
Land
Ash Tree Valley enters the battlefield tapped.
When Ash Tree Valley enters the battlefield, draw a card, then discard a card. If you discard a Mountain or a Forest in this way, untap Ash Tree Valley.
T: Add R or G to your mana pool.
Possible dual idea. Might be too good. Intended to be better for the late game. I'm sure older formats would appreciate easy discard though.
That's all for now.
Pacifist's Stance W
Enchantment - Aura (C)
Enchant creature
Enchanted creature gets -1/+2.
Aggrandize.
Parchment Gliding 1U
Enchantment - Aura (C)
Enchant creature
Enchanted creature has flying.
When enchanted creature dies, draw a card.
Aggrandize.
Biter's Blight B
Enchantment - Aura (C)
Enchant creature
Enchanted creature gets +2/-1.
Aggrandize.
Mane of Flame R
Enchantment - Aura (C)
Enchant creature
Enchanted creature gets +1/+0.
Aggrandize.
Scaleskin 1G
Enchantment - Aura (C)
Enchant creature
When Scaleskin enters the battlefield, put a +1/+1 counter on enchanted creature.
Sacrifice Scaleskin: Regenerate enchanted creature.
Aggrandize.
Champion of Lions 2GW
Enchantment - Aura (U)
Enchant creature
Enchanted creature gets +1/+1 for each Aura enchanting it.
Aggrandize.
Exceptionalism RW
Enchantment - Aura (R)
Enchant creature
Enchanted creature gets +1/+1.
As Exceptionalism enters the battlefield, choose first strike, lifelink, or vigilance. Enchanted creature gains that ability. If it already has those abilities, you may choose double strike, indestructible, or menace instead. If it already has those abilities, you may choose protection from blue, protection from black, or protection from green instead.
Aggrandize.
Greater Withering 2B
Enchantment - Aura (U)
Enchant creature
Enchanted creature gets -3/-3.
Aggrandize
Oppressive Tax 1W
Enchantment - Aura (U)
Enchant nonland permanent
When Oppressive Tax enters the battlefield or at the beginning of your upkeep, exile enchanted permanent unless its controller pays 1.
Aggrandize.
Spectral Rush 1BR
Enchantment - Aura (R)
Enchant creature
Enchanted creature has menace and haste.
Whenever enchanted creature deals combat damage to a player, that player discards a card. If that card is a nonland, noncreature card ~ deals 3 damage to that player.
Aggrandize.
Luscious Development 3GU
Enchantment - Aura (U)
Enchant land
When Luscious Development enters the battlefield, draw a card.
Whenever enchanted land is tapped for mana, add two mana in any combination of colors to your mana pool.
Aggrandize.
Feel free to create your own.
I'll split it up into two phrases for easy reading.
At the beginning of your upkeep, you may cast this card from your graveyard this turn for its mana cost.
At the beginning of your upkeep, exile this card from your graveyard unless you pay its memoriam cost.
So if you want to keep it in your graveyard, you have to pay. If you don't it is exiled. If you do it remains in your graveyard. You are not obliged to cast it that turn. You can keep paying for the luxury of casting it on a later turn. The abilities are tied together and share the same trigger so effects that allow cards to be cast at instant speed won't allow you to cast it before paying the memoriam cost. I find your wording more confusing just as a matter of parsing; it seems to imply if you don't cast the spell it's exiled.
More:
Scummy Filthdiggers 1R
Creature - Human Rogue (U)
When Scummy Filthdiggers dies, each player shuffles a card from his or her hand into his or her library, then draws a card.
Memoriam - 1G
When Scummy Filthdiggers enters the battlefield, if you cast it from your graveyard, put two target cards in a single graveyard on the bottom of their owner's library.
2/1
Unburied General 3BB
Creature - Zombie Soldier (R?)
Lifelink
Memoriam - WW
When Unburied General enters the battlefield, if you cast it from your graveyard, put a +1/+1 counter on each creature you control and those creatures gain lifelink until end of turn.
3/5
Walking Wallet 6
Artifact Creature - Construct (M)
Defender
Walking Wallet enters the battlefield with four +1/+1 counters on it
Whenever Walking Wallet blocks or becomes blocked, remove a +1/+1 counter from it create two artifact tokens named Gold with, "Sacrifice this artifact: Add one mana of any color to your mana pool."
Memoriam - GU
When Walking Wallet enters the battlefield, if you cast it from your graveyard, put two additional +1/+1 counters on it and it loses defender.
0/0
Bladegripper 2W
Creature - Human Soldier (R)
Memoriam - Tap an untapped equipment you control and pay its equip cost.
When Bladegripper enters the battlefield, if you cast it from your graveyard, tap it and attach target tapped equipment to it.
2/2
Fearless Goonsquad 4R
Creature - Human Berserker (U)
Haste
At the beginning of your end step, if ~ is untapped, it fights target creature an opponent controls.
Memoriam 1B
When ~ enters the battlefield, if you cast it from your graveyard, it gets +3/+0 until end of turn and regenerate it.
4/1
Oldriver Druid 2G
Creature - Elf Druid (U)
When ~ dies, return up to two target land cards in your graveyard to the battlefield tapped. They don't untap during your next untap step.
Memoriam - U, Sacrifice an Island
When ~ enters the battlefield, if you cast it from your graveyard, draw two cards then discard a card.
1/3
@user: I wanted a white Pacifism effect that wasn't too annoying to recur. I based it off Shackles. I figured that 3 mana up front and 5 mana every turn thereafter was a sufficient disincentive to play the card too often.
@Lucan: I like the parasitic ideas. The tomb was an attempt, although I suppose it's pretty slow.
Bride of Arteries 3B
Creature - Vampire
Flying, lifelink
At the beginning of each opponent's upkeep, that player may pay 3 life. If that player does, sacrifice Bride of Arteries and you gain 3 life.
Memoriam 1B
3/3
Tonbones 8B
Creature - Skeleton Giant
Tonbones costs X less to cast where X is the total converted mana cost of creature cards exiled from your graveyard this turn.
Memoriam - Exile a creature card from your graveyard.
8/1
This is somewhat parasitic in that other creature memoriam cards can feed it.
Potent Poltergeist 4UU
Creature - Spirit Artificer
~ can't be blocked as long as defending player controls an artifact.
Memoriam - Tap two untapped artifacts you control.
As long as ~ is in your graveyard, artifacts you control have hexproof and, "2, Exile a card from your graveyard: Untap this artifact. Activate this ability only once each turn."
3/3
Glottal Plosive 1R
Sorcery
~ deals 3 damage to target creature. If you cast ~ from your graveyard, it deals 6 damage to that creature instead and it deals 3 damage to you.
Memoriam 2RR
Priest of White Ash 1W
Creature - Human Cleric (U)
When Priest of White Ash enters the battlefield, exile up to three target cards from a single graveyard until Priest of White Ash leaves the battlefield.
Memoriam - W
1/3
Captain of Valorhelm WW
Creature - Human Soldier (C)
When Captain of Valorhelm enters the battlefield, tap or untap target creature.
Memoriam - Tap an untapped white creature you control.
2/2
Days of Mourning 1W
Enchantment - Aura (C)
Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
When a creature dies, tap enchanted creature.
Memoriam - 1W
Featherbraid Angel 3WW
Creature - Angel (M)
Flying
When Featherbraid Angel dies, create two 1/1 white Bird creature tokens with flying.
Memoriam - Tap two untapped white creatures you control.
When Featherbraid Angel is exiled from your graveyard, tap all creatures you control.
4/4
Diviner of Miseries 3U
Creature - Human Wizard
When Diviner of Miseries enters the battlefield, target player puts the top four cards of his or her library into his or her graveyard.
Memoriam - 1U
When Diviner of Miseries is exiled from your graveyard, put the top four cards of your library into your graveyard.
1/4
Serpent of Glowing AEther 3UU
Creature - Serpent Illusion (R)
When Serpent of Glowing AEther enters the battlefield, look at the top four cards of your library. You may reveal an instant or sorcery card from among them, put it into your hand, then put the rest on the bottom of your library in any order.
When Serpent of Glowing AEther becomes the target of a spell or ability, sacrifice it.
Memoriam - Exile an instant or sorcery card from your graveyard.
5/5
Whispering Yesterdays 2U
Sorcery (C)
Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Memoriam - 2U
When Whispering Yesterdays is exiled from your graveyard, exile two cards from your graveyard.
Morrowbond Sphinx 5UU
Creature - Sphinx (M)
Flying
When Morrowbond Sphinx dies, exile two cards from your graveyard. If you do, take an extra turn after this one.
Memoriam - 1UU
When Morrobond Sphinx is exiled from your graveyard, skip your next turn.
5/4
Omnipresent Roaches 1BB
Creature - Insect (U)
Deathtouch
Memoriam - Pay 1 life
When Omnipresent Roaches is exiled from your graveyard, you lose life equal to the number of cards in your graveyard.
1/1
Screaming Skull 1B
Creature - Skeleton (R)
Menace
Screaming Skull attacks if able.
When Screaming Skull attacks and isn't blocked, defending player loses 1 life, then you lose 1 life and draw a card.
Memoriam B
0/1
Gravebuster Ogre 4B
Creature - Ogre Zombie (C)
When you cast Gravebuster Ogre from your graveyard, return target creature card from your graveyard to your hand.
Memoriam - 1B
4/4
Master of Fealty 3BBB
Creature - Vampire (?)
Flying
When Master of Fealty enters the battlefield, gain control of target tapped creature. You may untap that creature. If you do, lose life equal to its power.
Memoriam - Sacrifice a creature
5/5
Pillaging Marauders 1RR
Creature - Human Berserker (C)
Haste
Pillaging Marauders attacks if able.
When Pillaging Marauders dies, it deals 3 damage to target opponent.
Memoriam - Sacrifice a land
3/1
Rumblestone Giant 4RRRR
Creature - Giant (M)
Rumblestone Giant costs 1R less to cast for each land put into a graveyard from the battlefield this turn.
Haste
Memoriam - Sacrifice two lands.
8/8
Rustwhisker Ouphe 2G
Creature - Ouphe
T, Sacrifice Rustwhisker Ouphe: Destroy target artifact.
G, T, Sacrifice an artifact: Exile target artifact.
Memoriam - Exile an artifact card from your graveyard.
2/2
Gathering Grains 1GG
Sorcery
Search your library for a basic Forest or Plains card, put it onto the battlefield tapped, then shuffle your library.
Memoriam GG
Venomweb Spider 3GG
Creature - Spider (R)
Deathtouch, reach
Memoriam - 1G
2/5
Tomb of Heroes' Bones 3
Artifact
Tomb of Heroes' Bones enters the battlefield tapped and doesn't untap during your untap step.
When a creature card is exiled from your graveyard, untap Tomb of Heroes' Bones.
T, Sacrifice Tomb of Heroes' Bones: Add CCC to your mana pool.
Memoriam 3
Artifact
When Mox Tigerseye enters the battlefield, sacrifice an artifact.
T: Add R to your mana pool.
It wanders from pocket to pocket and purse to purse, with only a few seeing a glint of its true potency.
Geode of Prophecies 2
Artifact
T: Add C to your mana pool.
When ~ is put into a graveyard from the battlefield, scry 3.
Warping Stones 4
Artifact
T: Add CC to your mana pool.
4, T, Sacrifice an artifact: Put a token that's a copy of Warping Stones onto the battlefield tapped.
Pebble of Ita 1
Artifact
T: Add one mana of any color to your mana pool.
At the beginning of your upkeep, sacrifice Pebble of Ita unless you pay 1.
A once grand city, Ita was destroyed over five generations at the order of Oltho Rex, the Undying King.
Monument to Oltho 9
Artifact
T: Add CCCCCC to your mana pool.
9: Monument to Oltho becomes a 9/9 Giant Construct creature until end of turn.
Mana Gravel 3
Artifact
T: Add one mana of any color to your mana pool.
4, T, Sacrifice two lands and Mana Gravel: Search your library for up to five basic land cards that don't share any land types, put them onto the battlefield tapped, then shuffle your library.
Poison-Barbed Ring 2
Artifact
Poison-Barbed Ring enters the battlefield tapped.
T: Add C to your mana pool.
2, T, Sacrifice Poison-Barbed Ring: Destroy target attacking creature with power two or less.
Island of Diamond 3
Artifact
0: Island of Diamond becomes an Island land until end of turn. It's still an artifact. (It has, "T: Add U to your mana pool.")
Cycled
@Philosopher: Fisherman's Foe is white, not blue. Its a white cards with a blue mana cost.
Sorcery
Destroy target enchantment. If it's enchanting a creature, destroy that creature.
"A heart on one's sleeve is easily pierced."
Slug of Guilt 2B
Creature - Slug
At the beginning of your upkeep, exile the top three cards of your library face-down.
When Slug of Guilt dies, look at the cards exiled by it and choose one. Put that card into your hand. You lose life equal to the number of cards still in exile.
1/1
Fisherman's Foe 5UU
Creature - Whale Leviathan
Fisherman's Foe is white.
Whenever Fisherman's Foe attacks, exile all blue creatures. Return them to the battlefield under their owner's control at the beginning of the next end step.
8/8
Fanatical Sailor 3WU
Creature - Human Pirate
When Fanatical Sailor enters the battlefield, search your library for a white Whale and put it onto the battlefield under target opponent's control. If you do, put five 1/1 blue Human creature tokens onto the battlefield.
Whenever a Whale attacks, put four 1/1 white Human creature tokens onto the battlefield.
2WU, T, Tap five untapped creatures you control: Tap target Whale. Gain control of that creature until the end of your next turn. Fanatical Sailor doesn't untap during your next untap step.
2/2
Gate of Iron and Gold 3
Artifact
3, T, Sacrifice a land: Reveal the top five cards of your library. Put up to two land cards revealed in this way onto the battlefield tapped. Put the rest on the bottom of your library in a random order.
Filament Spores G
Enchantment - Aura
Enchant creature
When Filament Spores enters the battlefield, scry 1.
Whenever enchanted creature becomes tapped, sacrifice Filament Spores and prevent all damage that would be dealt by enchanted creature this turn. Enchanted creature doesn't untap during it's controller's next untap step.
Big-Club Commander 5RR
Creature - Ogre Warrior
Haste
When ~ enters the battlefield, each player puts a 1/1 red Goblin creature token with haste onto the battlefield for each creature he or she controls that attacked this turn. After this phase, there is an additional combat phase followed by an additional main phase.
4/4
Miasma of Frost 4UU
Enchantment - Aura
Enchant creature
When Miasma of Frost, tap enchanted creature and up to three other target creatures.
Enchanted creature doesn't untap during its controller's untap step.
Hail and Thunder URR
Instant
Strive - Hail and Thunder costs 1 more to cast for each target beyond the first.
Tap any number of target creatures.
Hail and Thunder deals 2 damage to each of any number of target creatures for each creature tapped in this way.
Not sure how or if this one works.
Teleport Mishap 3U
Sorcery
Exile target nontoken creature you control. Put two tokens that are copies of it onto the battlefield.
Destination Not Found 5W
Sorcery
Exile up to two target nontoken creatures until a player casts a spell named Teleport Mishap. When they return to the battlefield, those creatures become Replicants in addition to their creature types and have, "At the beginning of your end step, if a player has both Teleportation Mishap and Destination Not Found in his or her graveyard, that player exiles them, melds them and sets the scheme in motion."
Interplanar Invasion
Ongoing Scheme
When you set this scheme in motion and at the beginning of each end step, put a token that's a copy of a Replicant or a token creature onto the battlefield.
At the beginning of your upkeep, if you control no Replicants or token creatures, abandon this scheme into exile.
I am aware of the memory issue. I'm posting it for help.
Sorcery
Target opponent loses 2 life. Exile a creature card from your graveyard. If you do, return Forlorn Whimper from your graveyard to your hand at the beginning of the next end step.
Blessed Memory 3W
Instant
Exile up to three target creature cards from graveyards. For each card exiled in this way, put a 1/1 white Spirit creature token with flying onto the battlefield.
Small Fry 2R
Sorcery
Choose one
-Small Fry deals 1 damage to each of three target creatures.
-Small Fry deals 2 damage to one target creature and 1 damage to another target creature.
-Small Fry deals 6 damage to target creature with power 2 or less.
Edit: Added a third mode.
Serpentus Interruptus 2G
Creature - Snake
Flash
When ~ enters the battlefield creature spells can't be countered this turn. Serpentus Interruptus gains deathtouch until end of turn.
2/2
Summoner's Flattery 2U
Instant
Counter target creature spell. Scry 1. You may reveal the top card of your library. If that card is a creature card, put a 0/3 blue Illusion creature token onto the battlefield. If that card has the same name as the countered spell, you may put it onto the battlefield.
Edit: Added the bit about the Illusion token.
Instant
Until end of turn, whenever a creature you control is exiled from the battlefield, put a token that's a copy of that creature onto the battlefield. That creature is a Reflection in addition to its creature types and has, "At the beginning of your upkeep, if you control a nonReflection creature with the same name as this creature, sacrifice this creature."
My intent was to make a card that would prevent Swords to Plowshares from working. This does more or less what I want without getting into apparently messy returning from exile territory.
I could make it cheaper at 1W and make it single target.
Enchantment
When Collected Screams enters the battlefield, each creature gets -2/-2 until end of turn.
Whenever a creature dies, put a scream counter on Collected Screams.
4BB, Sacrifice Collected Screams: Put a 2/2 black Zombie creature token onto the battlefield for each scream counter on Collected Screams.
Drop onto Rocks 3R
Instant - Trap
You may pay 1W rather than pay Drop onto Rocks' mana cost if you control a creature with flying. If you do, Drop onto Rocks can't target a creature with power greater than that creature's power.
Drop onto Rocks deals 2 damage to target attacking creature without flying. When that creature becomes blocked this turn, destroy it.
Scathing Retort 2R
Instant
Scathing Retort deals X damage to target noncreature spell's controller, where X is 2 plus that spell's converted mana cost.
Rescue from Eternity 3W
Instant
Exile target nontoken creature you own. At the beginning of the next end step, return that card and another creature card you own exiled from the battlefield this turn to the battlefield tapped.
Exile Rescue from Eternity.
Fish for a Day U
Instant
Target creature loses all abilities and becomes a base power and toughness 3/4 blue Fish until end of turn.
Joplain, the Artist 2GW
Legendary Creature - Human
When Joplain, the Artist enters the battlefield, search your library for an enchantment card, put it onto the battlefield with a paint counter on it, then shuffle your library.
When Joplain or a permanent with a paint counter on it leaves the battlefield, return Joplain and all permanents with any paint counters still on the battlefield to their owners' hands.
2/3
Helestra should draw a card should she die too.
Antelope Grove
Land
T: Put a 0/1 white Antelope creature token onto the battlefield. It can't attack or block for as long as you control a permanent named Antelope Grove.
T, Sacrifice an Antelope and Antelope Grove: Add GG, GW, or WW to your mana pool. You gain 2 life. (Bonus: Plus an additional 1 or 2 life for each Antelope you control.)
Alternate...
Antelope Grove
Land
T: Put a 0/1 white Antelope creature token onto the battlefield. It can't attack or block as long as you control a permanent named Antelope Grove
T, Sacrifice an Antelope and Antelope Grove: Add any combination of X green and or white mana to your mana pool, where X is two plus the number of Antelopes you control. You gain that much life.
Lots of variables here.
Alternatives include as before but can only produce a token as a sorcery.
I think 2 is the best number for Embers. I was thinking of a card like this...
Forging Ritual R
Sorcery
Add RRR to your mana pool. Forging Ritual deals 3 damage to you.
It's a "fair" card and could have been printed a while ago, but it would probably do something busted in older formats where the drawback is probably a positive.
Creature - Ape
Flash
When Hooting Gibbons enters the battlefield, destroy target artifact an opponent controls.
2/2
Antelope Grove
Land
Antelopes can't attack or block as long as Antelope Grove is tapped.
T: Put a 0/1 white Antelope creature token onto the battlefield.
T, Sacrifice an Antelope: Add G or W to your mana pool. You gain 1 life.
Smouldering Coals R
Sorcery
Add RR to your mana pool. Smouldering Coals deals 2 damage to you.
At the beginning of your precombat main phase, if Smouldering Coals is in your graveyard, exile it and copy it. Cast the copy without paying its mana cost.
Light on the formatting. I'm on mobile.