Fel orc Fel orcs , also known as chaos orcs , are orcs who represent disorder , which is manifested as fel magic , and the Burning Legion . Despite having the demonic felblood coursing through their bodies , they are not considered to be demons by some . Background . The creator — or progenitor — of all fel orcs is Gul ' dan , the first orc warlock , who had the orcs enslaved to the fel army known as the Burning Legion . Third War . The only instance in which fel orcs were active on Azeroth was during the Third War . Mannoroth tricked Grom Hellscream and his Warsong warriors into drinking his blood from a tainted fountain of health . Grom later overcame the blood haze with the help of Thrall and Jaina Proudmoore and slew Mannoroth , thus freeing both the fel orcs and the orcs that had been corrupted by Mannoroth on Draenor . In Burning Crusade . When the pit lord Magtheridon took control of Outland , he created fel orcs by corrupting them with his blood . Fel orcs made up the backbone of Magtheridon ' s armies . After Magtheridon was defeated by Illidan and imprisoned , the fel orcs stayed in Hellfire Citadel , keeping guard over the captured pit lord . This is the first known appearance of the fel orcs in " World of Warcraft " . They no longer serve the Burning Legion but follow Illidan instead . Illidan has continued using the blood of Magtheridon to create more fel orcs to follow him . A letter recovered from one of the orcs has revealed that Illidan is not pleased with the orcs ' progress with the defense of the Blood Furnace . It also seems they are experimenting on captured Mag ' har to create fel orcs . Caza ' rez , an orc of the Horde had been working on a cure for the fel orcs that were part of the Illidari . Many had been captured and cured , and serving in the ranks of the Horde . Legion . During the War in the Broken Isles , a large number of Fel orcs from Outland had been imprisoned in the Vault of the Wardens . Although , a large multitude of these beings had been cured , thanks to Caza ' rez , and been recruited into the ranks of the Horde and preparing for war against the Burning Legion that has prepared its third invasion on the world of Azeroth . However , some fel orc members of the Shadow Council had been summoned and aided the Legion in assaulting the Violet Hold . Physiology . The standard fel orc has red skin , and a ridge of long sharp spines coming out of its back . Bony horns grow from its arms and hands . Its eyes are bloodshot and glow red , and six long and thin fangs grow out of its mouth . Its ears are stubbier than orc ears , coming to a blunt point . Official site info . From archive page " World of Warcraft : The Burning Crusade " , Bestiary : Fel Clans Of Fel Orcs . Several corrupted clans ( or long - lost elements of clans in Azeroth ) have been discovered in the general vicinity of Hellfire Citadel : Physiology . The standard fel orc has red skin , and a ridge of long sharp spines coming out of its back . Bony horns grow from its arms and hands . Its eyes are bloodshot and glow red , and six long and thin fangs grow out of its mouth . Its ears are stubbier than orc ears , coming to a blunt point . RPG . An orc becomes a fel orc after consuming the blood of a pit lord . Then , a heavy blood haze falls over the orc , forcing him into a crazed bloodlust . The most prominent side effect of this blood haze is a deep red discoloration of the flesh and insane desire for battle and violence . Fel orcs are also more powerful than regular orcs , having chaos damage on all their attacks . Tainted Orcs . Tainted orc s is the RPG ' s term for green orcs , that is , the orcs that were corrupted by the Burning Legion ' s influence on Draenor . These orcs appear to be different from fel orcs , as they don ' t posses the physical attributes of a fel orc . The exact relation between tainted orcs and fel orcs has not been stated . It can be noted , though , that the transformations suffered by tainted orcs are less severe than those suffered by fel orcs .