Fanas, Aspect of the Void

Trample, Fanas attacks each turn if able.
As an additional cost to summon Fanas, exile 13
cards from permanents you control or your hand.
If Fanas is in a graveyard with 13 cards above it,
exile those cards and return Fanas to the
battlefield.
All cards that would be put into a graveyard are
exiled instead.
Fanas' power and toughness are equal to the
number of cards exiled by Fanas