When Sapseep Catacombs enters the battlefield, sacrifice it unless you pay .
: Add to your mana pool. Return Sapseep Catacombs to its owner's hand.
: Sapseep Catacombs becomes a 2/2 green Beast creature until end of turn. It's still a land.
.
: Add 
to your mana pool. Return Sapseep Catacombs to its owner's hand.
: Sapseep Catacombs becomes a 2/2 green Beast creature until end of turn. It's still a land.
