Blazeweaver1R
Creature - Human Shaman R: ~ gets +1/+0 until end of turn. If it's the twentieth time this ability resolves this turn, you win the game.
0/2
Force FractureRW
Instant
If a creature with trample is attacking and you control a creature, you may pay 0 rather than paying ~'s mana cost.
Each attacking creature deals X damage to itself, where X is that creature's power. The bigger they are, the worse is the fall.
Deity of Hunger7BRG
Creature - Avatar
Trample, haste
Devour 2
When ~ attacks, defending player sacrifices a creature for each +1/+1 counter on ~. "There is only the predator and there is only prey. We are merely appetizers to their main course. That is the order of nature, even the multiverse must adhere to."
5/5
Hedron BurstxR
Instant
As an additional cost to cast ~, exile X lands you control.
Put X 1/1 colorless Eldrazi Scion creature tokens onto the battlefield with "Sacrifice this creature: Add 1 to your mana pool."
Below and Under3BBB
Enchantment
Creature spells can only be cast from graveyards.
Creatures you control enter the battlefield with three +1/+1 counters on them.
Robust Terrain2WW
Enchantment
Spells you cast have Awaken 4 - X3W, where X is that spell's converted mana cost.
If a land you control would leave the battlefield, exile it instead. If you do, return that land onto the battlefield tapped at the beginning of the next end step.
Creature - Human Shaman
R: ~ gets +1/+0 until end of turn. If it's the twentieth time this ability resolves this turn, you win the game.
0/2
Instant
Split second
If it's not your turn, ~ costs 4 more to cast.
End the turn.
Instant
If a creature with trample is attacking and you control a creature, you may pay 0 rather than paying ~'s mana cost.
Each attacking creature deals X damage to itself, where X is that creature's power.
The bigger they are, the worse is the fall.
Instant
Exile target creature and that creature's owner's graveyard.
Next:
Splice and Merge
Weak and Numb
Tilt
Creature - Avatar
Trample, haste
Devour 2
When ~ attacks, defending player sacrifices a creature for each +1/+1 counter on ~.
"There is only the predator and there is only prey. We are merely appetizers to their main course. That is the order of nature, even the multiverse must adhere to."
5/5
Eternity is yet to be infinite.
Instant
As an additional cost to cast ~, exile X lands you control.
Put X 1/1 colorless Eldrazi Scion creature tokens onto the battlefield with "Sacrifice this creature: Add 1 to your mana pool."
Instant
Exile target nonblack, nonartifact creature. ~ deals 3 damage to that creature's controller.
Next:
Disturbia Spawn
Amberscale Creeper
Slap Down
Creature - Hound Beast
Vigilance, haste
Creatures your opponents control lose intimidate, fear, menace and first strike.
5/5
Enchantment
Creature spells can only be cast from graveyards.
Creatures you control enter the battlefield with three +1/+1 counters on them.
Enchantment
Spells you cast have Awaken 4 - X3W, where X is that spell's converted mana cost.
If a land you control would leave the battlefield, exile it instead. If you do, return that land onto the battlefield tapped at the beginning of the next end step.
Artifact Creature - Vedalken Wizard
Artifacts you control have: "2, T: Draw a card."
2/2
Enchantment
All spells have split second.
Legendary Creature - Cat Demon
Delve, convoke
Black spells you cast have delve.
White spells you cast have convoke.
2/4
Artifact
If an ability would trigger, instead it doesn't, unless any player pays 3.
Artifact
T: Add R to your mana pool.
T: Target creature gains haste until end of turn.