Tzeentch, Control Incarnate

Indestructible
As long as your devotion to blue is less than 6, Tzeentch isn’t a creature.
Other blue creatures you control get +1/-1,
menace, and “When this creature dies, you may
mill two cards. If you do, draw a card.”
{1}{u}, Sacrifice another creature: Draw a card. If sacrificed creature was blue, you may pay an additional {1} and 1 life to draw another card.