When Rot Ground enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Sacrifice Rot Ground: Add or to your mana pool.
, Sacrifice Rot Ground: Target creature gets +2/+2 until end of turn.
.
: Add 
or to your mana pool. or to your mana pool., Sacrifice Rot Ground: Target creature gets +2/+2 until end of turn.
