Spellthief's Capsule3
Artifact
Sacrifice Spellthief's Capsule: Until end of turn, you may cast target exiled card and you may spend mana as though it were mana of any color to cast it.
Sower of Dust2WW
Creature - Elemental
Flying
At the beginning of each player's upkeep, that player taps a creature, an artifact and a land he or she controls. 2/4
You're It! R
Enchantment - Aura
Enchant player
Whenever ~ enchants a player, put a sticky counter on this enchantment, then it deals damage to enchanted player equal to the number of sticky counters on it.
R: ~ enchants target player. Only the enchanted player may use this ability, and only any time that player can cast a sorcery.
Whenever a player loses the game and he or she controls a permanent that he or she doesn't own, return each of those permanents to its owner's hand as the player loses the game.
(im not sure if this works rules-wise, since player elimination is a state-based action, right, and can't be responded to?)
You can solve it with an "would/instead" that ends in them losing the game, but not before all permanents are returned:
"Whenever a player would lose the game, that player returns all permanents he or she controls to their owners' hands instead, then loses the game."
Note that it's probably okay to have them return permanents they own as well, since they are dead upon the resolution of this replacement effect anyway.
Vedalken Alchemist1WU
Creature - Vedalken Wizard
Whenever a permanent is returned to your hand, until end of turn, you may cast spells with the same name as that permanent as though they had flash.
2/2
Surge Cannon5UR
Sorcery
Surge Cannon costs 1 less to cast for each spell played before it this turn.
Surge Cannon deals 5 damage divided as you choose among any number of target creatures and/or players.
Draw a card.
As an additional cost to cast Upcycle Mizzium, discard a card, and pay x, where X is the discarded card's CMC.
If the discarded card was blue, draw a number of cards equal to half of X, rounded down.
If the discarded card was red, deal X damage divided as you choose among any number of creatures and/or players.
Chrome-Spire Researcher1U
Creature - Vedalken Wizard T: Scry 1.
Whenever you draw a card except the first one you draw in each of your draw steps, you may untap ~. 1/2
Bog Hermitess2BG
Creature - Hag
When ~ enters the battlefield, you may search your library for a creature card with power 3 or less, reveal it, put it into your hand, then shuffle your library. "Come my pretty, we have work to do."
3/3
Gratitious Stalking 1G
Sorcery
Target creature you control fights target creature you don't control. If your opponent's creature dies this way, draw a card.
EDIT: Nath'd.
Summoned Bear 1G
Creature - Bear
If you control a black creature, you may pay 2 life instead of paying ~'s mana cost.
2/2
Vampire Courtesan3B
Creature - Vampire Rogue
When ~ enters the battlefield, target player loses 2 life and you gain 2 life.
Pay 2 Life: Return ~ from the battlefield to your hand.
2/2
Pallid GlowwormsW
Creature - Insect
At the beginning of your upkeep, you gain 1 life. Delirium - At the beginning of your upkeep, if there four or more card types among cards in your graveyard, you gain 1 additional life. 1/1
Ajani's Combo Piece 2W
Enchantment
At the beginning of your upkeep, you gain 1 life.
Delirium - At the beginning of your end step, if there are four or more card types among cards in your graveyard, you may put X +1/+1 counters on target creature you control, where X is the amount of life you gained this turn.
Pollen Anthousai1WW
Enchantment Creature - Nymph
Constellation - Whenever ~ or another Enchantment enters the battlefield under your control, Gain 2 life.
0/4
Firegut (Rare) 2R
Legendary Creature - Ogre Shaman
3/4
Whenever a red instant or sorcery spell you control deals damage to a creature an opponent controls, that spell also deals that much damage to that creature's controller.
Partner (You can have two commanders if both have partner.)
Artifact
Sacrifice Spellthief's Capsule: Until end of turn, you may cast target exiled card and you may spend mana as though it were mana of any color to cast it.
Instant (R)
Target player skips his or her next untap step. Exile Stuck in Yesterday.
Creature - Elemental
Flying
At the beginning of each player's upkeep, that player taps a creature, an artifact and a land he or she controls.
2/4
Enchantment - Aura
Enchant player
Whenever ~ enchants a player, put a sticky counter on this enchantment, then it deals damage to enchanted player equal to the number of sticky counters on it.
R: ~ enchants target player. Only the enchanted player may use this ability, and only any time that player can cast a sorcery.
enchantment
Whenever a player loses the game and he or she controls a permanent that he or she doesn't own, return each of those permanents to its owner's hand as the player loses the game.
(im not sure if this works rules-wise, since player elimination is a state-based action, right, and can't be responded to?)
Legacy - Solidarity - mono U aggro - burn - Imperial Painter - Strawberry Shortcake - Bluuzards - bom
"Whenever a player would lose the game, that player returns all permanents he or she controls to their owners' hands instead, then loses the game."
Note that it's probably okay to have them return permanents they own as well, since they are dead upon the resolution of this replacement effect anyway.
Vedalken Alchemist 1WU
Creature - Vedalken Wizard
Whenever a permanent is returned to your hand, until end of turn, you may cast spells with the same name as that permanent as though they had flash.
2/2
Creature - Human Priest
Flash
When ~ enters the battlefield, you may return target creature you own to your hand.
1/3
Sorcery
Surge Cannon costs 1 less to cast for each spell played before it this turn.
Surge Cannon deals 5 damage divided as you choose among any number of target creatures and/or players.
Draw a card.
sorcery
As an additional cost to cast Upcycle Mizzium, discard a card, and pay x, where X is the discarded card's CMC.
If the discarded card was blue, draw a number of cards equal to half of X, rounded down.
If the discarded card was red, deal X damage divided as you choose among any number of creatures and/or players.
Legacy - Solidarity - mono U aggro - burn - Imperial Painter - Strawberry Shortcake - Bluuzards - bom
Sorcery
Choose one:
Scry 2
Or
Proliferate and draw a card
Sasky for the Sig.
I am in your [PACK]. Watching you... do... something.
Creature - Vedalken Wizard
T: Scry 1.
Whenever you draw a card except the first one you draw in each of your draw steps, you may untap ~.
1/2
Artifact - Equipment
Equipped creature has first strike.
Pay EE: Equipped creature gets +1/+0 until end of turn.
Equip 2
Creature - Frog
Deathtouch
2/5
Creature - Hag
When ~ enters the battlefield, you may search your library for a creature card with power 3 or less, reveal it, put it into your hand, then shuffle your library.
"Come my pretty, we have work to do."
3/3
Sorcery
Target creature you control fights target creature you don't control. If your opponent's creature dies this way, draw a card.
EDIT: Nath'd.
Summoned Bear 1G
Creature - Bear
If you control a black creature, you may pay 2 life instead of paying ~'s mana cost.
2/2
Creature - Vampire Rogue
When ~ enters the battlefield, target player loses 2 life and you gain 2 life.
Pay 2 Life: Return ~ from the battlefield to your hand.
2/2
Sasky for the Sig.
I am in your [PACK]. Watching you... do... something.
Creature - Insect
At the beginning of your upkeep, you gain 1 life.
Delirium - At the beginning of your upkeep, if there four or more card types among cards in your graveyard, you gain 1 additional life.
1/1
Enchantment
At the beginning of your upkeep, you gain 1 life.
Delirium - At the beginning of your end step, if there are four or more card types among cards in your graveyard, you may put X +1/+1 counters on target creature you control, where X is the amount of life you gained this turn.
Enchantment Creature - Nymph
Constellation - Whenever ~ or another Enchantment enters the battlefield under your control, Gain 2 life.
0/4
Sasky for the Sig.
I am in your [PACK]. Watching you... do... something.
Enchantment - Aura
Enchant creature
Flash
Enchanted creature gets +0/+2 and has defender.
Sorcery
~ deals 4 damage to target creature.
2R
Legendary Creature - Ogre Shaman
3/4
Whenever a red instant or sorcery spell you control deals damage to a creature an opponent controls, that spell also deals that much damage to that creature's controller.
Partner (You can have two commanders if both have partner.)
Sorcery
~ deals 3 damage to x target creatures.
Sasky for the Sig.
I am in your [PACK]. Watching you... do... something.
instant
add RRR to your mana pool. Use this mana only to cast spells or activate abilities with x in its mana cost.
Legacy - Solidarity - mono U aggro - burn - Imperial Painter - Strawberry Shortcake - Bluuzards - bom
Sorcery (R)
~ costs 2 less to cast for each dragon creature you control.
~ deals X damage to target creature.