Father of Plagues

Each creature card in your graveyard has unearth {2}{b}{b} (Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
When a creature enters the battlefield from any graveyard, create a 1/1 black Rat token creature.
If that creature is black, the next time it would
be exiled this turn, return it to its owner's hand instead.