Chaos Gear (カオスドラゴンのロストギアカオスギア, Kaosugia) also known as "Lost Gear of the Chaos Dragon" is a powerful high-tier sacred gear that falls below the Longinus class sacred gears in terms of power. Is a sacred gear wielded by Ichiro Alastor, the main protagonist of DxD: Heavenly Dragon Kings. It holds the soul of Kaos, the dragon of Chaos, one of the two false Dragon Emperors. It has the power to manipulate matter through the use of his addition ability.