When Fetid Crater enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
: Fetid Crater becomes a 2/1 black and red Specter creature until end of turn. It's still a land.
.
: Add 
or to your mana pool.: Fetid Crater becomes a 2/1 black and red Specter creature until end of turn. It's still a land.
