Grass-Flats enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Sacrifice Grass-Flats: 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.
