Cevraya, Golgari Shaman

{1}{b}{g},{t}, Exile a creature card from your
graveyard. Create one green
X/X Ooze creature token, where X is the exiled creature's power. Activate this ability only at
anytime you could cast a sorcery.
Whenever you exile one or more cards from your graveyard, Cevraya, Golgari Shaman deals 2
damage to target player.