Academy Caves enters the battlefield tapped unless you pay 2 life.
: Add or to your mana pool.
Sacrifice Academy Caves: Add or to your mana pool.
, , Sacrifice Academy Caves: Target creature gets -2/-2 until end of turn.
: Add 
or 
to your mana pool. or to your mana pool., , Sacrifice Academy Caves: Target creature gets -2/-2 until end of turn.
