Grasp the Void

Altered
The next instant or sorcery spell you cast this turn gains Empty {3} (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.).
The next creature that enters the battlefield this turn is void and a grimoire instead of its other types.