Dark Bahamut (Final Fantasy)

Dark Bahamut in the original Final Fantasy. He appears in the Soul of Chaos, there is a Dark Bahamut in the Lifespring Grotto. Like the version that changes the player characters' class, Dark Bahamut sets the party on a trial. Dark Bahamut's trial is to slay a certain number of specific colors of dragon from his underlings, and the reward is that he will open the door and let the party out of the room. The quest can be completed by killing all of the dragons in the room without concern for their color.