coldsnap

Creatures you control get +X/+X until end of turn, where X is 1 plus the number of cards named Kjeldoran War Cry in all graveyards.

Flying Krovikan Mist's power and toughness are each equal to the number of Illusions on the battlefield.

Destroy target creature with power 2 or less. Recover {1}{B}{B} (When a creature is put into your graveyard from the battlefield, you may pay {1}{B...

Enchant creature Cumulative upkeep {U} or {B} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you ...

Trample, haste Lightning Serpent enters the battlefield with X +1/+0 counters on it. At the beginning of the end step, sacrifice Lightning Serpent.

Lightning Storm deals X damage to any target, where X is 3 plus the number of charge counters on Lightning Storm. Discard a land card: Put two char...

Each creature that's a Barbarian, a Warrior, or a Berserker gets +2/+2 and has haste.

Prevent all damage that black sources and red sources would deal this turn.

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for ...

{2}, Reveal X red cards from your hand, Sacrifice Martyr of Ashes: Martyr of Ashes deals X damage to each creature without flying.

{1}, Reveal X black cards from your hand, Sacrifice Martyr of Bones: Exile up to X target cards from a single graveyard.

{2}, Reveal X blue cards from your hand, Sacrifice Martyr of Frost: Counter target spell unless its controller pays {X}.

{1}, Reveal X white cards from your hand, Sacrifice Martyr of Sands: You gain three times X life.

{1}, Reveal X green cards from your hand, Sacrifice Martyr of Spores: Target creature gets +X/+X until end of turn.

{T}, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

{T}: Add {C}. {4}{S}, {T}, Sacrifice Mouth of Ronom: It deals 4 damage to target creature. ({S} can be paid with one mana from a snow source.)

Destroy target artifact or enchantment. Draw a card at the beginning of the next turn's upkeep.

Whenever Ohran Viper deals combat damage to a creature, destroy that creature at end of combat. Whenever Ohran Viper deals combat damage to a playe...

{2}{S}: Target snow creature gains first strike until end of turn. ({S} can be paid with one mana from a snow source.)

{T}, Sacrifice a creature: Orcish Bloodpainter deals 1 damage to any target.

Trample While you're searching your library, you may cast Panglacial Wurm from your library.

Draw two cards, then sacrifice a permanent.

Flying; fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Cumulative upkeep {B} (At the beginning of your...