Tranquil Hollow enters the battlefield tapped unless you sacrifice a colorless permanent.
: Add or to your mana pool.
Sacrifice Tranquil Hollow: Add or to your mana pool.
, Sacrifice Tranquil Hollow: Add to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool., Sacrifice Tranquil Hollow: Add 
to your mana pool.
