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Whenever Sludge Monster enters the battlefield or attacks, put a slime counter on up to one other target creature. Non-Horror creatures with slime ...

Counter target spell. If the spell is countered this way, exile it with three time counters on it instead of putting it into its owner's graveyard....

Search your library for an instant card or a card with flash, reveal it, and put it into your hand. Then shuffle your library. Flashback {5}{B} (Yo...

When Confounding Conundrum enters the battlefield, draw a card. Whenever a land enters the battlefield under an opponent's control, if that player ...

Kicker {X}. X can't be 0. (You may pay an additional {X} as you cast this spell.) Flying When Thieving Skydiver enters the battlefield, if it was k...

Flying At the beginning of combat on your turn, if you have a full party, choose target nonland permanent an opponent controls. Until your next tur...

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying. Foretell {U} (During your turn, you may pay {...

At the beginning of your upkeep, you may exile Cosima. If you do, it gains "Whenever a land enters the battlefield under your control, if Cosima is...

Flying Creature spells with flying you cast cost {1} less to cast. Whenever another creature with flying enters the battlefield under your control,...

Counter target spell unless its controller pays {3}.

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

Legendary Riptide Specialization (You may only have 1 Buzzsaw Trap in your deck and only if your hero is Riptide.) When this defends an attack wit...

Choose one — • Target creature gets +3/+3 until end of turn. • Permanents you control gain hexproof until end of turn. • Return target creature to ...

When Treasure Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 6 or greater, reveal it, put i...

Other blue creatures you control get +1/+1. {U}: Target artifact creature becomes blue until end of turn. Tap an untapped blue creature you control...

Whenever you cast your first spell during each opponent's turn, draw a card.

Whenever a Mutant, Ninja, or Turtle you control enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a...

Target player draws X cards. Create a token that's a copy of up to one target creature with mana value X or less.

Whenever Krang & Shredder enter or attack, each opponent exiles cards from the top of their library until they exile a nonland card. Disappear ...

Draw three cards. Then discard a card unless you waterbend {2}. (While paying a waterbend cost, you can tap your artifacts and creatures to help. E...

Counter target spell. Draw a card, then mill three cards. Untap target land.

Counter target spell. Draw a card, then mill three cards. Untap target land.

Target creature you control gets +1/+1 and gains hexproof until end of turn. Untap it. (It can't be the target of spells or abilities your opponent...

The owner of target creature or enchantment puts it into their library second from the top or on the bottom. You create a Clue token. (It's an arti...