 They steal the Golden Mask, a sacred relic of the Kinniku clan, creating impostor masks and forcing Kinnikuman to use its sibling relic the Silver Mask to find the genuine Golden Mask.The theft of the Golden Mask sapped the power of the Justice Choujins, initially rendering all of them but Kinnikuman unable to fight.After Sneagator and Planetman's defeat, the rest of the Devil Knights retreat to Warsman's body, initiating the Five Story Ring battle in order to save Warsman.