One of these signals flickered –- a phenomenon associated with Warp storms, although none were reported at that time. Certainly the Massacre on Olney and the loss of the Legion's last remaining Stormbird on the moons of Sestus bear his mysterious hallmarks. Any who encountered the Fallen would bear witness not only to the original betrayal, but also the Legion's ensuing cover-up.

Sightings corroborate what blurry vid-captures show: that the robed one is often not a mere accomplice, but can be seen actively leading warbands as varied as rabble-rousing Cultists, Renegade Space Marines and the arch-enemies of the Imperium, the Chaos Space Marine Legions themselves. He will not hesitate to spend their blood if it grants him but a further second needed to escape the clutches of pursuit. Those young enough to survive the ordeal received the full gene-seed implant, while others –- like the arch-traitor Luther -– were otherwise augmented into elite soldiers. The Legion's second-in-command, Luther, betrayed the Dark Angels and turned many of their brethren from the Emperor. Among his confirmed kills (according to Dark Angels records) have been planetary governors, Chaos Space Marine Warlords, Space Marine Chapter Masters, sorcerous covens, cult leaders and high ranking Inquisitors.

This has, more than once, brought the Dark Angels and their successor Chapters into direct conflict with their own allies. M33) - Cypher's timely intervention prevents the Orks from looting the Lion Helm and the Sword of Secrets from the slain body of the fallen Supreme Grand Master Alloken.

Within a decade, the Dark Angels and several of their successor Chapters suppress the Chaos Cultist uprisings and slay their leaders. After their very first few encounters, the Dark Angels began to realise that this Fallen might be different. Over the millennia, Cypher's trail has, time and again, led the Unforgiven Chapters to some new revelation.From the Dark Angels' records, it is believed that Cypher had spent some twenty Terran years in the Cult of the Red Heresy, a growing anarchic movement that was drawing in agitators from seven systems. His apparent ability to mask himself has since been observed many times, but whether it comes from innate psychic powers or some unknown artefact has never been determined.