Godless Cliff enters the battlefield tapped unless you sacrifice a creature.
: Add or to your mana pool.
Sacrifice Godless Cliff: Add or to your mana pool.
, Sacrifice Godless Cliff: Add to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool., Sacrifice Godless Cliff: Add 
to your mana pool.
