Sphinx of Forgotten Lore

Flash (You may cast this spell any time you could cast an instant.)
Flying
Whenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Destello.
Vuela.
Siempre que esta criatura ataque, la carta de instantáneo o de conjuro objetivo en tu cementerio gana la habilidad de retrospectiva hasta el final del turno. El coste de retrospectiva es igual al coste de maná de esa carta.