Rotcloud Illusion

Realign (If only black mana was spent to cast this
spell, it's not green. If only green mana was spent to
cast this spell, it's not black.)
Trample
As Rotcloud Illusion enters the battlefield,
sacrifice any number of creatures. Rotcloud
Illusion enters the battlefield with two +1/+1
counters on it for each creature sacrificed this
way.