Spectral Arcanist [Innistrad: Crimson Vow Commander]

Set: Innistrad: Crimson Vow Commander Type: Creature — Spirit Wizard Rarity: Rare Cost: {3}{U} FlyingWhen Spectral Arcanist enters the battlefield, you may cast an instant or sorcery spell with mana value less than or equal to the number of Spirits you control from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.