Meros - Signus Prime: Upon the blighted Signusi capital world of Signus Prime, Apothecary Meros met his ultimate fate. It was there that the Blood Angels Legion finally confronted the true enemy that now controlled the Signus System, the Ruinous Powers of Chaos. Upon the Plains of the Damned the ferocious Space Marines confronted the vast, nightmarish horde of Chaos Cultists and packs of monstrous daemons.Sanguinius swore to personally confront and vanquish Kyriss the Perverse, the Keeper of Secrets and Greater Daemon of Slaanesh who controlled the Signus System, leading his elite companies to besiege the daemons' defiled palace that was known as the Cathedral of the Mark. Awash in blood, the Blood Angels valiantly fought the Forces of Chaos, cutting them down in their corrupted thousands. The ash wastes of Signus Prime, later known as the Plains of the Damned, became a charnel house as the Blood Angels forced their way into the very heart of the Greater Daemon's realm. On the battlefield that was Signus Prime, Sanguinius was confronted by the infamous Bloodthirster Ka'bandha, a Greater Daemon of Khorne.The Angel and the Daemon fought a titanic battle amidst the blood and carnage all around them. At the height of this confrontation, as the Primarch prepared to strike a killing blow against the fallen Bloodthirster, Ka'bandha struck a dishonourable blow with its massive barbed whip around the Primarch's legs, smashing the Angel to the ground. The Greater Daemon then summoned forth the malefic powers known as the Ragefire, and cut a huge swathe through the ranks of the Sons of Baal with his great axe, killing 500 Blood Angels in an instant. The psychic backlash of so many of his sons dying so suddenly blasted Sanguinius into unconsciousness.Leaderless, the Blood Angels' fury was unfettered. The brutal violence of the Bloodthirster Ka'bandha unleashed something dark within the psyche of the Blood Angels, a thirst for blood that would not be slaked until the taint of Chaos had been wiped away from the planet. The Sons of Sanguinius lost themselves in the riot of killing. Careful, drilled lines of company and Chapter became broken and mixed, and from hour to hour, the IXth Legion slowly transformed into something wild.Its Astartes became a red hurricane that tore across Signus Prime leaving nothing in its wake. The Blood Angels fought as they had never fought before, not with cool reason and righteous might as their guides, but with hearts beating for vengeance, a berserker’s blood-thirst on their lips. Unstoppable, all that stood in their path was obliterated. The foe had gravely miscalculated the will of the Angels. Far from being broken by the vicious, brutal attack upon their beloved Sanguinius, they had been cut loose by it.The bonds that held them in check were slipped, and a darkness previously hidden was fully unleashed. Each of them bayed for the blood of their enemy, but it was a thirst that could not be slaked -- only given respite for a brief interval. The red tide broke upon the walls of the great cathedral with unspeakable violence and the clash of a hundred thousand weapons. Leaderless and out of control, the Blood Angels acted on lethal instinct, converging at the towers of bone with only one impulse powering them forward. Hate drove them into the cohorts of Bloodletters and Succubae defending the approaches to the temple, and they tore the daemonic creatures into shreds. The Sons of Sanguinius were no longer a Space Marine Legion, but a force of nature laying waste to everything that stood in their way.Miraculously unaffected by the Red Thirst, Chapter Master Raldoron, Meros and a small strike force of Blood Angels assaulted the Cathedral of the Mark. As the majority of their Legion was gripped in the bloody throes of their genetic curse, Meros and his Battle-Brothers fought through hordes of daemons in order to infiltrate the profane basilica. In the meantime, Raldoron's Adjutant, Brother Mkani Kano, gathered his fellow former Librarians who had been forbidden to use their psychic abilities since the Emperor's Decree Absolute during the Council of Nikaea, in an attempt to use their combined psychic abilities to wake their Primarch from his dark torpor.Using their combined psychic might, the Librarians sacrificed themselves with the exception of Kano, and miraculously awoke their Primarch, bringing him back from the edge of the abyss. The Angel arrived to confront both Kyriss and Ka'bandha. The Bloodthirster and the Angel fought once more, but ultimately, Sanguinius prevailed and cast the Greater Daemon back into the Warp. The Blood Angels discovered the source of the rage that infected their entire Legion. The Dark Apostle Erebus had created a fell device, a psychic construct known as the Ragefire, which contained and was powered by the half-dead body of Captain Tagas, the former Captain of the Blood Angels' 111th Company, who had been presumed killed in action on the world of One-Forty-Twenty, the planet called Murder by all the Space Marines who had fought there several standard years earlier.Through the use of the dark sorceries of Chaos, the Word Bearers had created a conduit of undiluted rage that consumed nearly the entirety of the Blood Angels Legion. Driven to uncontrollable rage over their fallen Primarch, the Forces of Chaos hoped that the Blood Angels would lose control of their noble aspect, and willingly give themselves over to the Scarlet Path and the worship of the Blood God Khorne.