Da'at, the Emptiness

Flying, Hexproof, Indestructible
Da'at, the Emptiness's power and toughness are
equal to X plus the number of cards in your graveyard and in exile.
Da'at, the Emptiness cannot be blocked by
creatures with power 2 or greater.
Creatures and land your opponents control do
not untap.
When Da'at, the Emptiness would die, shuffle
your graveyard into your library and put Da'at,
the Emptiness 3 cards from the top.