Mazchna is a demon by race; he is the only known demon Slayer Master, apart from Achtryn, his temporary replacement during the quest While Guthix Sleeps. Mazchna became very skilled in combat and Slayer, and eventually became a Slayer master. Mazchna chased away all the other demons in Morytania, gaining a Slayer master monopoly in the area. Mazchna, unlike some other demons, strives to be good.