Yvruul, Void Manifest

Yvruul can’t attack unless the total mana value of permanents you control is 27 or greater.

Annihilator 3

If a permanent would be put into a graveyard or a spell is countered, exile it instead.
Whenever an instant or sorcery spell is cast, transform Yvruul. If that spell targets Yvruul, counter and exile it instead.

"One cannot see nothing coming when there is nothing to see." — Jace Beleren