Krelius, Fire of Undeath

Flying, Prowess
{u}{b}{r}, Sacrifice a creature: Cast target instant
or sorcery card with converted mana cost X or less from your graveyard without paying its mana cost, where X is 1 plus the sacrificed creature's converted mana cost. If a card cast this way
would be put into your graveyard this turn, shuffle it into your library instead
{u}{b}{r}, {t}: Return target creature card from
your graveyard to your hand.