Scourge of Naktamun

Each non-Zombie creature card in your graveyard has embalm. The embalm cost is equal to its mana cost plus {1}. (To embalm a creature, exile it from your graveyard by paying
for its embalm cost. Create a token that's a copy
of it, except it's a white Zombie in addition to its other types with no mana cost. Embalm only as
a sorcery.)