Battlefield Cavern enters the battlefield tapped.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, , Sacrifice Battlefield Cavern: Target creature gets -2/-2 until end of turn.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead., , Sacrifice Battlefield Cavern: Target creature gets -2/-2 until end of turn.
