Ulazaq, King of Hell

{t}{b}{b}{b}{b}{b} target player loses control of all their creatures (creatures controlled by no one attack every two turns and attack each player in turn order, this attack takes place after Ulazaq, King of Hell's controller's turn)
The end of Krath-{ut}{6}All Eldrazi currently on the battlefield gain +2/+2 and indestructable and attack their controller