Treetop Bastion enters the battlefield tapped unless you sacrifice an artifact.
: Add or to your mana pool.
Sacrifice Treetop Bastion: Add or to your mana pool.
: Prevent the next 1 damage that would be dealt to target creature this turn.
: Add 
or 
to your mana pool. or to your mana pool.: Prevent the next 1 damage that would be dealt to target creature this turn.
