Signus Campaign - Aftermath: On Signus Prime, on Holst, and in orbit, in every place where his warriors had set foot, Sanguinius commanded that his sons excise all evidence that the IX Legion had ever come to the Signus Cluster. Over the days that passed after the final charge on the Cathedral of the Mark, an army of Legion Servitors and the Astartes officers known as Wardens had gathered up every Battle-Brother's corpse, every broken vehicle, every torn piece of armour or blunted sword. The work was almost complete, but for the spent casings of a few bolt shells lying lost and buried in the sands, but little more. The Blood Angels would leave nothing behind in that blighted, murdered place. Not their ships, not their relics and not their precious dead.No one would return to the Signus Cluster. This command was etched into the IX Legion's Book of Hours by the Primarch's own hand. The Blood Angels would not build a monument or grave marker on Signus Prime, as they had on other planets where so much Astartes blood had been shed. The hundreds upon hundreds of honoured Blood Angels dead would be taken home to Baal to be buried on the slopes of Mount Seraph, the injured warships to Imperial stardocks for repair and re-armament.Warning buoys and automated beacons were deployed all about the trinary star system's perimeter, there to turn back any ships that might come that way in the years ahead. The Signus Cluster was declared Mortae Perpetua; "forever dead." It would be left lifeless and rotting until its suns burned cold, with nothing but the echoes of those who perished there to bear witness.In the aftermath of the bloodbath at the Cathedral of the Mark, when the witchery of the Ragefire had finally been broken, the character of the Blood Angels had turned to morose mien and the bitter sting of misery. The IX Legion had been wounded on Signus Prime, a cut that had pressed to their very core. Like their Primarch, the Blood Angels had been blindsided by those they called kin. The distant perfidy of the Warmaster Horus and the closer lies of the Word Bearers had brought them to the brink of the abyss. They had been shown the worst of themselves, and it was a sobering truth to behold.Time would tell if the Blood Angels could heal this wound, or if it would fester within them for eternity. Their genetic curse had been revealed to the Astartes of the IX Legion. Sanguinius had hoped it would never be so, and in his hubris he had tried to hide the truth. Horus had used that deception against him. So many trusts had been broken, but now every Blood Angel knew the burn of the Red Thirst, the shadow on their spirit, and the worst of it was every Blood Angel knew an even greater darkness lay beneath that impulse. The Angel vowed that he would do everything in his power to hold that future at bay.As for the daemonic entity known as the Red Angel, it soon presented itself to Horus aboard his flagship, the Vengeful Spirit. The Red Angel revealed itself as the Fallen Son of Baal, the Cruor Angelus, the Willing Slave. The Red Angel was a weapon to be used at Horus and the Traitor Legions' disposal, a weapon intended to seize Terra and ultimately throw down the False Emperor in the name of the Warmaster and the Dark Gods he served.