Al-Skaven, Emrakul's Equal

Flash, Hexproof, Annihilator 2
When Demonic Abomination enters the battlefield, you may pay {3} and destroy 4 target permenents if it's not your turn.
Eldrazi you control cost 4 less to cast.
{5}{u}{u}{u}: Search your library for up to 3 Eldrazi Creature Cards, and put it into your hand.
{10}: Search your library for a Legendary Eldrazi Creature Card, and put onto the battlefield tapped.
it doesn't untap during your next untap step.