Emrakul, Realm Devastator

When you cast Emrakul, Realm Devastator, take
an extra turn after this one. Emrakul can't be countered. At the beginning of your upkeep, target opponent sacrafices three lands.
Flying, protection from everything
When Emrakul is put into a graveyard from anywhere, its owner shuffles his or her graveyard into his or her library.