Maggot Therapy

Flash
Enchant creature
Enchanted creature gets +2/-2.

Conspiracy

As Conspiracy enters, choose a creature type.
Creatures you control are the chosen type. The same is true for creature spells you control and creature cards you own that aren’t on the battlefield.

Midnight Ritual

Exile X target creature cards from your graveyard. For each creature card exiled this way, create a 2/2 black Zombie creature token.

Undertaker

, , Discard a card: Return target creature card from your graveyard to your hand.