Nilnud, Shrieker of Havoc

When you cast Nilnud, Shrieker of Havoc, return target permanent from a graveyard to its owner's hand.
Flying trample, annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.)
When Nilnud is put into a graveyard from anywhere, its owner shuffles his or her graveyard into his or her library.