Dragon's Devil Arm

Dragon's Devil Arm (ドラゴンデヴィルアーム,Doragondevu~iruāmu) also known as "dark dragon curse", is a dragon-type Sacred Gear used by Joey Redgrave, the chosen prophet of God in the bible. the soul of the Dark Dragon Emperor, Yamato. It has the ability to enhance the wielder's power to reduce his enemies powers in his/her weakest state. Every use of the devil arm enhances each time from 5 times to to beyond infinity. During the Great War, The Dark Knight's descendant, used the shadow dragon's power to separate and seal away the Three Factions.