Fall of Medusa V - The Forces of Chaos: Ygethmor the Deceiver, the four-eyed Sorcerer Lord of the Black Legion and a Chosen of Abaddon the Despoiler, was gifted with a vision by the Ruinous Powers of the Warp, a glimpse of the future that might come into being through his own actions. He saw himself exalted upon a mountain of corpses as the undiluted power of the Warp writhed about him. He saw a planet scoured clean by the power of Chaos Undivided, transmuted into a Daemon World of the Warp with himself as its Daemon Prince and master.Ygethmor was not unknown to the Inquisition. During the 13th Black Crusade which had concluded only a few weeks before the Medusa V campaign began, the Officio Assassinorum had sanctioned the deployment of an Officio Assassinorum Execution Force to eliminate Ygethmor amongst other notable targets among the Forces of Chaos. While scrutiny of their field records is impossible, at least 7 Assassinorum agents were known to have failed in the attempt to take the sorcerer's blasphemous life. Following the 13th Black Crusade Ygethmor was responsible for the destruction of the population of the worlds of Corrialis and Galafonte. Ordo Hereticus agents in the Galafonte System failed to learn the lesson of what Ygethmor was capable of following the Corrialis Massacres. In almost identical circumstances to what had happened on Corrialis, the population of Galafonte turned upon itself worshipping the Dark Gods of Chaos in a frenzied slaughter of all life in the heavily populated star system. The Inquisition later speculated that the extermination of both Corrialis and Galafonte were little more than "experiments" in damnation, paving the way for Ygethmor's attempt to transform himself into a Daemon Prince on Medusa V. Ygethmor commanded the powerful Repulsive-class Grand Cruiser Blade of Damnation, which boasted firepower and accuracy far above other vessels of its class. The Blade of Damnation was known to be possessed by a daemonic spirit, which was consistent with the many infernal war engines used by Ygethmor's Black Legion warband of Chaos Space Marines.On Medusa V, Ygethmor knew what must be done if he was to realise the future the Ruinous Powers had promised him -- the planet had to die. Atop a pillar of cadavers heaped upon the ruins of the Imperial Cathedral in the planet's capital city of Hive Euryales, a sorcerous ritual of inconceivable power had to be enacted. At the very moment that the approaching Warp Storm engulfed the planet, Ygethmor would be required to call upon the unlimited power of the Warp. Yet, for this ritual to succeed, it required millions of lives to be sacrificed to the Dark Gods and the glorious victory of the Forces of Chaos over the world's Imperial defenders. To achieve his aims, Ygethmor gathered under his leadership a mighty force, a conglomeration of Chaos Space Marine warbands. Each was an army in its own right and each was led by a Chaos Lord hungry to share in the Deceiver's glory and bathe in the approval of the Ruinous Powers. Thousands of Chaos Space Marines from the infamous Traitor Legions, including the Black Legion, Emperor's Children, the Iron Warriors, the Word Bearers, the Death Guard and the Alpha Legion rallied to Ygethmor's cause, their numbers swollen by Renegade Space Marines from the Maelstrom Warp rift in the Eastern Fringes. Every warrior in Ygethmor's army fought to honour the Dark Gods and to enjoy the blessings of Chaos if they succeeded. For Ygethmor, the prize was the power of the Warp unleashed and dominion over what might become his Daemon World of Medusa V. Despite his promises to Abaddon, Ygethmor fought for more than the glory of the Warmaster and Chaos; every victory brought him one step closer to daemonhood.