It's a piece of the Dragon Wizard Set from the Dragon Knight Saga game. "Blessed by the Maxos rituals, Dragon Knights became natural becons of magic: the powers of which – be it for creation or destruction, righteousness or mischief – they could use at will and whim. Soon, some of them not only let themselves be engulfed by the sources of sorcery, but wrapped them around their bodies: solidly embedded in blade and cuirass."