Drogan - WAAAGH! Grimclaw: Long before the Ork invasion of Forge World Graia, Drogan was captured by a species of xenos and tortured for many standard years. This left a great hatred for aliens within his heart that left him resolved to spend the rest of his life seeking for a way to conclusively end all the alien threats facing the Imperium. During a journey through the Warp, Drogan, who was a psyker, let his psychic defenses down for a moment and a spark of Warp energy appeared before him. When he once more travelled through the Immaterium, he was able to summon another spark and capture it in a containment device. With the blessing of his Radical superiors in the Inquisition, Drogan decided to research a technological means to wield the power of the Warp against the enemies of the Imperium.To that end, Drogan travelled to the Forge World of Graia. Drogan had convinced several Graian Tech-priests of the Adeptus Mechanicus to allow him to conduct his research there into Warp-related technologies, a clear violation of the orthodox doctrines of the Cult Mechanicus and a dangerous step into tech-heresy. However, Drogan's research and experiments soon drew the attention of the Ruinous Powers, and a Daemon of Chaos was sent forth to retrieve the spark of empyrean power in the Inquisitor's possession. The Daemon killed Drogan and took possession of his corpse, as was later made evident by Servo-skull hololithic recordings found by Captain Titus of the Ultramarines. What was left of Drogan was little more than an undead flesh puppet, a disguise of flesh for the Daemon to wear on its quest to aid the forces of Chaos in conquering the Forge World.Before he died, Drogan had sent a distress signal for assistance as Graia came under the assault of WAAAGH! Grimskull. Captain Titus of the Ultramarines 2nd Company was the first of the Adeptus Astartes to answer. When the Space Marines arrived, the Daemonhost Drogan tasked the Ultramarines to help further his plan -- which was actually to open a Warp Gate on Graia and allow the Heretic Astartes warband known as the Chosen of Nemeroth under the command of the Chaos Sorcerer Nemeroth to come and seize the planet and its valuable resources, notably a manufactorum for Warlord-class Titans.The Daemonhost told the Ultramarines truthfully that the power source technology he wanted them to reclaim for him drew upon the energies of the Warp, leading Leandros, a young member of Titus' Command Squad, to voice his displeasure at aiding the Inquisitor in violation of the Codex Astartes. Titus reassured Leandros that the Codex was merely a guide for the action of Space Marines, not holy writ, and that they should aid the Inquisitor.The possessed Drogan led Titus to eventually load the power source into a launcher and fire the weapon, which would allegedly lead to a psychic scourge which would kill the Orks assaulting Graia by overloading the Greenskins' gestalt psychic field of WAAAGH! energy and destroying their minds. Instead, when the weapon was fired at a spire of a Mechanicus stronghold, which had been prepared by the Daemonhost to serve as a conductor for its power, it allowed an invasion by the forces of Chaos under the command of Nemeroth to begin by unleashing a Warp storm over the world.It was in that moment that the charade finally ended, as the Sorcerer Lord Nemeroth emerged onto the soil of Graia and stripped his servant of its disguise. Drogan's actions eventually led Captain Titus to stop both  the Ork invasion and to kill Nemeroth, yet his unsuauly resistance to the sorcerer's psychic powers led to suspicion of heresy against Titus and his being taken for questioning by Inquisitor Thrax after the Forge World had been secured.