Grassy Mesa enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Sacrifice Grassy Mesa: Add or to your mana pool.
: Target 1/1 creature gets +1/+0 until end of turn.
.
: Add 
or 
to your mana pool. or to your mana pool.: Target 1/1 creature gets +1/+0 until end of turn.
