(: Add or to your mana pool.)
When Caves Forge enters the battlefield, sacrifice it unless you pay 1 life.
, , Sacrifice Caves Forge: Put a -1/-1 counter on target creature.
, : Put a 1/1 Bird creature token onto the battlefield.
: Add 
or 
to your mana pool.), , Sacrifice Caves Forge: Put a -1/-1 counter on target creature.
, : Put a 1/1 Bird creature token onto the battlefield.
