The Luminous Magic Beast is one of the final bosses in Lost Odyssey. It is summoned by Gongora when the heroes confront him in the Tower of Mirrors, and is said to be spawned from the magic energy emitted by the mirrors within the tower. Note that having the Magic Counter ability equipped on any party member is detrimental, since even counterattacks will be absorbed by the beast. It might take a while, but the Luminous Magic Beast can be worn down with the above strategies and basic combat tactics. Once it falls, you can finally get a shot at Gongora!