Emrakul, Petrifying Prese

: Whenever an opponent casts a spell, put a loyalty counter on Emrakul. Whenever you cast a creature spell, put a loyalty counter on Emrakul.
-3: You may use this ability at instant speed. Once each turn, cast a creature exiled by "Soul Clouding" and exile one spell on the stack.
-15: You control each opponent during their next turn. For each spell an opponent plays during their next turn, each opponent mills 3 cards.