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Landfall — Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.

When Hostage Taker enters the battlefield, exile another target creature or artifact until Hostage Taker leaves the battlefield. You may cast that ...

Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on target Merfolk you control.

Whenever a creature you control attacks, it gets +1/+0 until end of turn for each other attacking creature that shares a creature type with it.

{T}: Add {R}. Spend this mana only to cast an instant or sorcery spell. Craft with four or more red instant and/or sorcery cards {3}{R}{R} ({3}{R}{...

Whenever Coercive Recruiter or another Pirate enters the battlefield under your control, gain control of target creature until end of turn. Untap t...

When Altar of the Wretched enters the battlefield, you may sacrifice a nontoken creature. If you do, draw X cards, then mill X cards, where X is th...

If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Whenever a Vampire you control attacks, each opponent loses 1 life and you gain 1 life.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color....

Menace, deathtouch When Dire Fleet Ravager enters the battlefield, each player loses a third of their life, rounded up.

Svyelun of Sea and Sky has indestructible as long as you control at least two other Merfolk. Whenever Svyelun attacks, draw a card. Other Merfolk y...

Flash (You may cast this spell any time you could cast an instant.) Flying {3}{U}: Draw a card.

When Admiral Brass, Unsinkable enters the battlefield, mill four cards. At the beginning of combat on your turn, you may return target Pirate creat...

Other Merfolk creatures you control get +1/+1. Whenever you cast a Merfolk spell, you may tap or untap target permanent.

Other Merfolk creatures you control get +1/+1. {T}: Target Merfolk creature can't be blocked this turn.

Ghost of Ramirez DePietro can't be blocked by creatures with toughness 3 or greater. Whenever Ghost of Ramirez DePietro deals combat damage to a pl...

Return all creatures to their owners' hands.

When Departed Deckhand becomes the target of a spell, sacrifice it. Departed Deckhand can't be blocked except by Spirits. {3}{U}: Another target cr...

Whenever you cast a Merfolk spell, create a 1/1 blue Merfolk creature token with hexproof. (A creature with hexproof can't be the target of spells ...

{1}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.) Whenever one or more +1/+1 counters are put on Benthic ...

If a source would deal damage to another Dinosaur you control, prevent all but 1 of that damage.

Whenever one or more nontoken Vampires you control attack, create a 1/1 white Vampire creature token with lifelink.

You have no maximum hand size. {T}: Add {C}.