When Steam Crypt enters the battlefield, sacrifice all creatures you control.
: Add to your mana pool. Activate this ability only if you control a Mountain.
: Add to your mana pool. Activate this ability only if you control a Swamp.
: Return Steam Crypt to its owner's hand.
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: Add 
to your mana pool. Activate this ability only if you control a Mountain.
to your mana pool. Activate this ability only if you control a Swamp.
