When Caves Store enters the battlefield, sacrifice it unless you pay 3 life.
, : Add , or to your mana pool.
: Caves Store becomes a 2/1 black and white Specter Rat creature until end of turn. It's still a land.
, 
: Add 
, 
or to your mana pool.: Caves Store becomes a 2/1 black and white Specter Rat creature until end of turn. It's still a land.
