Lingering Phantom is a uncommon Creature — Spirit card from Dominaria (DOM), collector number 99. Current market price: $0.07 (foil $0.40), TCGplayer market prices via Scryfall.
Whenever you cast a historic spell, you may pay {B}. If you do, return this card from your graveyard to your hand. (Artifacts, legendaries, and Sagas are historic.)