Flatline - First card makes sure a block happens and then the second card tosses a bunch of damage around for the Doyen to play with. Simple but not really explosive.
Hemlock - First card is a bit pushed for an uncommon, but workable. Second card's kicker ability would work better in white, since white is the only color shared by all the cards with this effect.
Cardz5000 - I have to say, these are not the most elegant cards, especially that second one.
Yeah, this is an environment where you might well have three planeswalkers and two creatures with +1/+1 counters on them, then get two proliferates a turn with this. And I'm talking about Sealed here.
Phyrexian RepurposerBG
Artifact - Equipment (U)
Living Weapon (When this Equipment enters the battlefield, create a 0/0 black Germ creature token, then attach this to it.)
Equipped creature gets +1/+1 and "Whenever an artifact or creature card is put into a graveyard from anywhere, put a +1/+1 counter on this creature."
Equip 2
Archon's Armor4
Artifact - Equipment (R)
Miracle 3WW
Equipped creature gets +2/+2 and has indestructible.
When Archon's Armor enters the battlefield, if you cast it for its Miracle cost, create a 5/5 white Archon token creature with flying. Attach Archon's Armor to that creature.
Equip 4
Fireweaver Fletcher1RR
Creature - Human Archer Wizard (U)
Reach
Whenever an Archer you control attacks, it deals 1 damage to target creature. A steel-tipped arrow is deadly. A steel-tipped arrow on fire is just overkill.
1/3
Cover-Fire Brigade1WW
Creature - Human Archer (U)
Vigilance
Whenever a creature blocks or becomes blocked by a creature you control, Cover-Fire Brigade deals 1 damage to that creature. Nothing is more welcome than a hail of arrows from behind when the enemy is charging your way.
1/3
Pride Arms-Master2WWW
Creature - Cat Soldier (R)
When Pride Arms-Master enters the battlefield, create three equipment artifact tokens named "Leonin Scimitar" with Equip 1 and "Equipped creature gets +1/+1." You may attach those tokens to creatures you control. Masters of weaponcraft are more rare among than leonin than many other races, but when one of the lion folk devotes themselves fully to the forge and the blade they can be true prodigies.
2/2
Innovation Stalker4UR
Creature - Viashino Wizard (R)
Innovation Stalker costs 1 less for each card you have drawn this turn.
Flying, haste
Whenever Innovation Stalker deals combat damage to a player, draw a card. She hunts genius by scent, feeding on grand ideas and, sometimes, those who have them.
2/3
The Epic of Predation2GGG
Enchantment - Saga(MR) (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I: Create two 1/1 green Insect creature tokens.
II: Sacrifice each Insect you control. Create a 3/3 green Beast token with haste for each creature sacrificed this way.
III: Sacrifice each Beast you control. Create a 5/5 green Wurm creature token with haste and trample for each creature sacificed this way.
Hellpact NecromancerBBB
Creature - Human Wizard (MR)
When Hellpact Necromancer enters the battlefield, create a 1/1 black Imp creature token with flying and "Wizard creatures you control are indestructable."
At the beginning of each end step, you may return a creature card with converted mana cost X or less from a graveyard to the battlefield, where X is the number of Wizard creatures you control. A pact with Dorugon damns both the maker and those who work magic alongside him.
1/3
Baliff of Spells3W
Creature - Human Wizard (R)
Vigilance Addendum - UU, T: Counter target spell unless its controller pays 1. If it is your main phase, counter that spell unless it's controller pays 3 instead.
2/4
Foothold To Nyx1G
Sorcery (C)
Bloat (You may discard an enchantment card or sacrifice an enchantment as an additional cost to cast this spell.)
You may search your library for up to two basic land cards that share a basic land type and reveal them. Put those cards into your hand. If Foothold to Nyx was bloated, put one of those land card onto the library battlefield instead. Shuffle your library. The gods wondered what mighty force could possibly be draining their strength. They never imagined an invasion could begin with mold.
Bane Satyr1GG
Enchantment Creature - Satyr Horror (R)
Corrupt artifact or enchantment 2GG(If you cast this card for its corrupt cost, it's an Aura spell with enchant artifact or enchantment. It becomes a creature again if it's not attached to a permanent.)
Enchanted artifact or enchantment has "At the beginning of your upkeep, sacrifice this permanent." Phyrexia adapts as it feeds.
4/2
Foothold To Nyx1G
Sorcery (C)
Bloat (You may discard an enchantment card or sacrifice an enchantment as an additional cost to cast this spell.)
You may search your library for up to two basic land cards that share a basic land type and reveal them. Put those cards into your hand. If Foothold to Nyx was bloated, put one of those land card onto the library instead. Shuffle your library. The gods wondered what mighty force could possibly be draining their strength. They never imagined an invasion could begin with mold.
Raider of Towers1RG
Creature - Elf Archer (U)
Riot, reach
Whenever Raider of Towers attacks, it deals damage equal to its power to target creature with flying defending player controls. If you can't bring the tower down, at least bring down the skyjeks defending it.
2/2
The Power of Faith1WB
Enchantment (R)
At the beginning of your end step, you may put a faith counter on target creature you control. If you do, gain life equal to its toughness.
Creatures with faith counters are white and their colored mana symbols are white. 2BB: Each player loses X life, where X is your devotion to white. Activate this ability only if your devotion to black is three or more. Hope spreads faith. Ambition weaponizes it.
This Must Not Be
Legendary Enchantment (MR)
When This Must Not Be enters the battlefield, chose an opponent. That opponent investigates twice.
Whenever the chosen opponent draws a card, put a fate token on This Should not Be. Then if it has five or more fate counters on it, sacrifice This Must Not Be.
When you sacrifice This Must Not Be, create a 5/5 black and blue Horror creature token with flying and indestructible.
Hemlock - First card is a bit pushed for an uncommon, but workable. Second card's kicker ability would work better in white, since white is the only color shared by all the cards with this effect.
Cardz5000 - I have to say, these are not the most elegant cards, especially that second one.
Top 3:
1. Flatline
2. Hemlock
3. Cardz5000
Yeah, this is an environment where you might well have three planeswalkers and two creatures with +1/+1 counters on them, then get two proliferates a turn with this. And I'm talking about Sealed here.
Artifact - Equipment (U)
Living Weapon (When this Equipment enters the battlefield, create a 0/0 black Germ creature token, then attach this to it.)
Equipped creature gets +1/+1 and "Whenever an artifact or creature card is put into a graveyard from anywhere, put a +1/+1 counter on this creature."
Equip 2
Artifact - Equipment (R)
Miracle 3WW
Equipped creature gets +2/+2 and has indestructible.
When Archon's Armor enters the battlefield, if you cast it for its Miracle cost, create a 5/5 white Archon token creature with flying. Attach Archon's Armor to that creature.
Equip 4
Creature - Human Archer Wizard (U)
Reach
Whenever an Archer you control attacks, it deals 1 damage to target creature.
A steel-tipped arrow is deadly. A steel-tipped arrow on fire is just overkill.
1/3
Cover-Fire Brigade 1WW
Creature - Human Archer (U)
Vigilance
Whenever a creature blocks or becomes blocked by a creature you control, Cover-Fire Brigade deals 1 damage to that creature.
Nothing is more welcome than a hail of arrows from behind when the enemy is charging your way.
1/3
Creature - Cat Soldier (R)
When Pride Arms-Master enters the battlefield, create three equipment artifact tokens named "Leonin Scimitar" with Equip 1 and "Equipped creature gets +1/+1." You may attach those tokens to creatures you control.
Masters of weaponcraft are more rare among than leonin than many other races, but when one of the lion folk devotes themselves fully to the forge and the blade they can be true prodigies.
2/2
Creature - Viashino Wizard (R)
Innovation Stalker costs 1 less for each card you have drawn this turn.
Flying, haste
Whenever Innovation Stalker deals combat damage to a player, draw a card.
She hunts genius by scent, feeding on grand ideas and, sometimes, those who have them.
2/3
Enchantment - Saga(MR)
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I: Create two 1/1 green Insect creature tokens.
II: Sacrifice each Insect you control. Create a 3/3 green Beast token with haste for each creature sacrificed this way.
III: Sacrifice each Beast you control. Create a 5/5 green Wurm creature token with haste and trample for each creature sacificed this way.
Creature - Human Wizard (MR)
When Hellpact Necromancer enters the battlefield, create a 1/1 black Imp creature token with flying and "Wizard creatures you control are indestructable."
At the beginning of each end step, you may return a creature card with converted mana cost X or less from a graveyard to the battlefield, where X is the number of Wizard creatures you control.
A pact with Dorugon damns both the maker and those who work magic alongside him.
1/3
Creature - Human Wizard (R)
Vigilance
Addendum - UU, T: Counter target spell unless its controller pays 1. If it is your main phase, counter that spell unless it's controller pays 3 instead.
2/4
Sorcery (C)
Bloat (You may discard an enchantment card or sacrifice an enchantment as an additional cost to cast this spell.)
You may search your library for up to two basic land cards that share a basic land type and reveal them. Put those cards into your hand. If Foothold to Nyx was bloated, put one of those land card onto the
librarybattlefield instead. Shuffle your library.The gods wondered what mighty force could possibly be draining their strength. They never imagined an invasion could begin with mold.
Boon Satyr
Bane Satyr 1GG
Enchantment Creature - Satyr Horror (R)
Corrupt artifact or enchantment 2GG (If you cast this card for its corrupt cost, it's an Aura spell with enchant artifact or enchantment. It becomes a creature again if it's not attached to a permanent.)
Enchanted artifact or enchantment has "At the beginning of your upkeep, sacrifice this permanent."
Phyrexia adapts as it feeds.
4/2
Foothold To Nyx 1G
Sorcery (C)
Bloat (You may discard an enchantment card or sacrifice an enchantment as an additional cost to cast this spell.)
You may search your library for up to two basic land cards that share a basic land type and reveal them. Put those cards into your hand. If Foothold to Nyx was bloated, put one of those land card onto the library instead. Shuffle your library.
The gods wondered what mighty force could possibly be draining their strength. They never imagined an invasion could begin with mold.
Creature - Elf Archer (U)
Riot, reach
Whenever Raider of Towers attacks, it deals damage equal to its power to target creature with flying defending player controls.
If you can't bring the tower down, at least bring down the skyjeks defending it.
2/2
Enchantment (R)
At the beginning of your end step, you may put a faith counter on target creature you control. If you do, gain life equal to its toughness.
Creatures with faith counters are white and their colored mana symbols are white.
2BB: Each player loses X life, where X is your devotion to white. Activate this ability only if your devotion to black is three or more.
Hope spreads faith. Ambition weaponizes it.
Legendary Enchantment (MR)
When This Must Not Be enters the battlefield, chose an opponent. That opponent investigates twice.
Whenever the chosen opponent draws a card, put a fate token on This Should not Be. Then if it has five or more fate counters on it, sacrifice This Must Not Be.
When you sacrifice This Must Not Be, create a 5/5 black and blue Horror creature token with flying and indestructible.