Emrakul Who Was Betrayed

Subtract the total converted mana cost of all eldrazi you control from the mana cost of this card* equals 20 minus opponents life total plus the total power of all creatures.When you cast this spell, take control of opponents next turn. They take an extra turn after that one. Flying, Trample, Annihilator 8. Protection from all non-legendary angel or eldrazi spell. If such a spell enters the battlefield, transform. Pay{2}{0}, transform