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Whenever a creature enters the battlefield under your control, put a +1/+1 counter on each creature you control.

{T}: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it dies, if it had no -1/-1 counters on ...

{T}: Add {C}. {T}: Add {W} or {B}. Caves of Koilos deals 1 damage to you.

Return target nonland permanent to its owner's hand. Then that permanent's controller may sacrifice a land. If the player does, they may copy this ...

Creatures with power less than Champion of Lambholt's power can't block creatures you control. Whenever another creature enters the battlefield und...

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it ont...

Haste At the beginning of each player's end step, if no creatures attacked this turn, put a fury counter on Charging Cinderhorn. Then Charging Cind...

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker. When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, w...

Artifact spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting an artifact spell pays for {...

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

As Citadel Siege enters the battlefield, choose Khans or Dragons. • Khans — At the beginning of combat on your turn, put two +1/+1 counters on targ...

Choose one or more — • Clan Defiance deals X damage to target creature with flying. • Clan Defiance deals X damage to target creature without flyin...

Undaunted (This spell costs {1} less to cast for each opponent.) Return all nonland permanents to their owners' hands.

When Coiling Oracle enters the battlefield, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put t...

Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X i...

{T}: Add one mana of any color in your commander's color identity.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

Equipped creature gets +1/+1 for each color among permanents you control. As long as Conqueror's Flail is attached to a creature, your opponents ca...

Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards. Whenever you cast a spell, each opp...

If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on it instead.

Crackling Doom deals 2 damage to each opponent. Each opponent sacrifices a creature with the greatest power among creatures that player controls.

Equipped creature gets +1/+0 for each artifact you control. {B}{B}: Attach Cranial Plating to target creature you control. Equip {1}

Choose target player and another target player. The first player controls the second player during the second player's next turn, and the second pl...

Crumbling Necropolis enters the battlefield tapped. {T}: Add {U}, {B}, or {R}.