Grimoire of Maledictions

Exile a card from your graveyard: Add one mana of any color.

{2}{b}, {t}, Sacrifice a creature: Search your library
for a Curse card, reveal it, and put it into your
hand, then shuffle.

{4}{b}, {t}: Choose a Curse card in your
graveyard. You may cast the chosen card without
paying its mana cost until end of turn.