@Introvert It might be a spoiler, i don't know lol, but the holy graal was a sacred relic right, maybe what bell have is the real one, the pure version, and what the emperor stole from the temple, is the cursed version, i think bell, can somehow purify and free the trapped souls inside the cursed holy graal, thats why it exist 2x of them, one inside bell and another with the emperor, i guess in some point bell will purify the cursed holy graal.