Magtheridon by Dracula

The Burning Legion took full advantage of the open portals created by Ner'zhul, sending the mighty pit lord Magtheridon to seize the broken world in Kil'jaeden's name. With the clans in disarray, and most killed in the disaster, Magtheridon was quick to show his power, and rallied the surviving orcs under his pennant. The orcs were corrupted and became fel orcs. He declared himself the ruler of the ruined world Outland and ruled from the Black Temple, formerly the Temple of Karabor. Over the years, Magtheridon brought legions of demons to Outland through the four dimensional gateways which Ner'zhul shattered the world with, and his forces became very expansive. These forces included nether dragons, voidwalkers, succubi, felguards, felbeasts, doomguards, eredar, and infernals. He continued attacking the draenei and everything that opposed him. It was almost twenty years after the cataclysm that Illidan and his forces came to Outland, to escape Kil'jaeden, Illidan's vengeful master, and his wrath. Magtheridon found himself under attack by Illidan, Kael'thas' blood elves, Lady Vashj's army of naga, and even the elusive Ashtongue tribe of broken draenei led by the elder sage Akama. The group managed to shut down the dimensional gateways which supplied Magtheridon with reinforcements, and then laid siege to Magtheridon's Black Temple. The Pit Lord rallied his forces to defend himself, but the combined skills and armies of Illidan's forces crushed his resistances. Eventually Illidan broke through and Magtheridon was defeated by the four generals. Magtheridon asked if Illidan had been sent by the Legion to test him but Illidan cackled in reply, saying that he had come to replace him. Recently it was discovered that after his defeat, Magtheridon was dragged all the way to Hellfire Peninsula and is locked up in a lair created for him underneath Hellfire Citadel, his blood being used to create fel orcs for Illidan Stormrage. It is interesting to note that his wardens are not fel orcs, but normal green-skinned orcs. It seems that Illidan is keeping Magtheridon alive for the sole reason of creating more fel orcs under his rule. While he is not an ally of Illidan, he remains a powerful tool.