sentences:  But Sigma also started to gather large numbers of human scum as sacrifices to power his creation.Refusing to allow this, Mio attempted to destroy Gyanon with Sigma forced to kill her before he slammed his left hand onto the Horror's corpse in rage over another loved one's betrayal, causing his left arm to take on a red Horror-like appearance with a mask covering his face.Known originally as the when he makes his presence known to the Senate, Sigma engraves the on Kouga and other Makai Knights like Rei and Tsubasa, the effect being that it shortens the inflicted Makai Knight's lifespan whenever they don their Makai armor, with chronic pain a side effect that intensifies each time the armor is summoned, weakening the Makai Knights gradually over time, and eventually killing them when he activates the seal.