Merfolk Crypt enters the battlefield tapped unless you control four or more Rats.
: Add to your mana pool. Activate this ability only if you control an Island.
: Add to your mana pool. Activate this ability only if you control a Swamp.
: Merfolk Crypt becomes a 2/2 blue Crab creature until end of turn. It's still a land.
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: Add 
to your mana pool. Activate this ability only if you control an Island.
to your mana pool. Activate this ability only if you control a Swamp.
: Merfolk Crypt becomes a 2/2 blue Crab creature until end of turn. It's still a land.
