Unsealed Knight of Caos

Devoid
X-Log (All instances of x are equal to how much
you put into each x when casting this card.)
{p/r}, Destroy up to x target non-land permanents.
Then exile one card at random from your hand, graveyard and library.
{p/r}{p/r}, Return x cards that were exiled by
Unsealed Knight of Caos to your hand.