Quetzel Carthach - History: Amongst his self-appointed titles, Carthach referred to himself as "Master of Harrows" which may be a reference to the ancient title of Harrowmaster the Great Crusade-era Alpha Legion once used for its praetors. In fact, the Harrowing was a special military tactic employed by the Alpha Legion during which its Heretic Astartes would force their opponent's hands by creating certain situations that would influence the course of battle in the Alpha Legion's favour.Manipulated to pursue a path of action that led to his own defeat, the enemy invariably found himself surrounded and attacked from all sides before the killing blow came, preferably from an unexpected quarter. During a Harrowing, the Alpha Legion did not hesitate to commit acts of sabotage, assassination, coerce high-ranking military personnel to commit treachery, disguise their own troops as the enemy or even influence the weather to force the outcome they desired. These are all elements that can be found in the strategy Carthach employed against the forces of the Imperium.On Vitrea Mundi, the homeworld of the Marines Mordant, Carthach's army did not hesitate to use chemical weapons to achieve its goals. Turncoat Planetary Defence Forces unleashed a chemical reaction in Vitrea Mundi's great soda-lakes, which began to spew a cloud of highly acidic fog around the planetary capital of Salina City, where the Marines Mordant's fortress-monastery, the Bas-Silica, was located.Pandemonium erupted, with hordes of civilians pressing themselves at the fortress-monastery's gates, imploring the Marines Mordant's Chapter Master Tarro Pallidax to allow them in to safety. When the honorable Chapter Master agreed to open his stronghold's gate, Carthach's army stormed the fortress, taking it in a matters of solar hours.But Pallidax had ordered the Marines Mordant's only remaining battle barge, the Assiduous, to open fire on the doomed fortress-monastery. To facilite the attack, Pallidax lowered the Bas-Silica's void shields.However, the Alpha Legion had already foreseen that the Loyalists would attempt this strategy and the Redacted warband of Heretic Astartes under the command of the Chaos Champion Occam the Untrue had successfully overwhelmed the command crew of the Assiduous not long after Pallidax's final order had been received. However, Occam believed that Carthach intended to ultimately betray and slay him, so he allowed the Assifuous to carry out the Chapter Master's final orders. The orbital bombardment razed the Bas-Silica to the ground, killing friend and foe alike. Carthach was believed to be among the dead, but this was erronoeus and the Chaos Lord had survived.Alongside his few remaining loyalists, Carthach ultimately resurfaced on the world of Procul-Sanctus, though he had not survived unscathed. His broken body was now pinned and braced in his shattered power armour. Half of his skull had to be reconstructed, leaving one eye a mess of staples and stitching pins. Even so, at Procul-Sanctus had prepared a vengeful ambush for Occam the Untrue's forces by guiding the Inquisition and Grey Knights to attack Occam himself, while mortal Human allies slaughtered The Redacted's Chaos Cultists at Procul-Sanctus, and Carthach himself boarded Occam's Q-Ship Iota-Æternus.Contacting his former ally by vox, Carthach could not help himself but to gloat about his success and how he had brought down his rival by using one of Occam's own followers, Autolicon Phex. However, Occam used the opportunity to order his assassin Mina Perdita to damage the Iota-Æternus's Gellar Field. As the voidship had been previously possessed by Daemons, this caused the entire ship to immediately begin to kill every mortal aboard. Carthach screamed in frustration, even as he and his last loyalists were torn apart by their own possessed vessel.