Out of all the bosses in Castlevania: Belmont’s Curse, only the Brittle King is truly optional. There is a tasty reward at the end of it in the form of Excalibur, the greatsword of Arthurian Legend and one of the most powerful weapons in the game, but that and the Brittle King’s Arcana powers are the only tangible rewards for this side endeavor. And he doesn’t exactly make it easy to fight him in the first place. His chambers are…