Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Tap two untapped creatures you control: You may put a creature card from your hand that shares a creature type with each creature tapped this way onto the battlefield.

{2}, {T}: You gain 5 life. Shuffle this artifact and your graveyard into their owner's library.

Draw a card. Clash with an opponent. If you win, return Research the Deep to its owner's hand. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Create two 1/1 blue Merfolk Wizard creature tokens. Tap four untapped Merfolk you control: Return this card from your graveyard to your hand.

Tap an untapped Merfolk you control: Target player mills a card.

Whenever this creature becomes tapped, you may draw a card.

Nonbasic lands are Islands.

{W}, {T}: This creature deals X damage to target attacking or blocking creature, where X is the number of Merfolk you control.

Whenever a Merfolk you control becomes tapped, you may gain 1 life.

Spells your opponents cast that target a Merfolk you control cost {2} more to cast. Abilities your opponents activate that target a Merfolk you control cost {2} more to activate.

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) When this creature enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.

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

This creature can't be blocked.

Whenever this creature deals combat damage to a player, draw a card.

{T}: Target creature gets -X/-0 until end of turn, where X is the number of Merfolk and/or Faeries you control.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Merfolk spells and Wizard spells you cast cost {1} less to cast.

Whenever this creature becomes tapped, you may create a 1/1 blue Merfolk Wizard creature token.

Svyelun has indestructible as long as you control at least two other Merfolk. Whenever Svyelun attacks, draw a card. Other Merfolk you control have ward {1}. (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) {1}{W}: Target Merfolk you control gains protection from the color of your choice until end of turn.

{T}: Target land becomes the basic land type of your choice until end of turn. Activate only during your turn.

This creature can't be blocked.

Flash Other Merfolk you control get +1/+1. Sacrifice a Merfolk: Counter target noncreature spell unless its controller pays {1}.

Whenever one or more nontoken Merfolk you control become tapped, create a 1/1 blue Merfolk creature token with hexproof.

Creatures you control get +0/+1. Morph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

At the beginning of your end step, untap all Merfolk you control.

Tap an untapped creature you control: Tap target artifact, creature, or land.

Enchant creature Enchanted creature can't attack or block.

Target creature you control gets +0/+3 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

As an additional cost to cast this spell, return a creature you control to its owner's hand. Counter target spell.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{U}.

({T}: Add {U}.)

({T}: Add {W}.)