At the beginning of your upkeep, Crater Cavern deals 2 damage to target creature you control.
, : Add to your mana pool.
: Crater Cavern becomes a 2/1 red and black Beast creature until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.: Crater Cavern becomes a 2/1 red and black Beast creature until end of turn. It's still a land.
