Godrick, The Grafted

Menace
Creature cards in your graveyard have graft.
({b}{g}{u}: Exile this card from your graveyard under
a creature you control. That creature has the characteristics of each card exiled under it this way.)
Whenever you graft a card under Godrick,
The Grafted, you may draw two cards. If you do, discard a card.
Godrick the Grafted gets +X/+X where X is
the number of creature cards exiled under him.