Lucie, Widow of Ulara

When Lucie, Widow of Ulara dies, exile all cards from a single graveyard.
Empty {0} (You may cast this card for its empty cost. If you do, exile it as it resolves. During your precombat main phase, if an opponent cast no spells last turn, you may cast the exiled card without paying its mana cost. Empty only as a sorcery.)
({0} represents void mana)