Emrakul, the Promised End

Emrakul, the Promised End costs {1} less to cast
for each card type among cards in your graveyard.
When you cast this spell, you gain control of
target opponent during that player's next turn.
After that turn, that player takes an extra turn.
Flying, trample, protection from instants
"I am Tzeentch and you are the puppet
that dances to my tune..."