Zaha, Eldrazi's Herald

+1: Create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this creature: Add Colorless."
-2: Exile target nonland permanent if it has converted mana cost equal or less than the number of colorless nonland permanent you control.
-2: Create a 0/0 colorless Eldrazi creature token with "This creature gets +1/+1 for each colorless nonland permanent you control."