Of All The Legends Of The Imperium, One Of The Strangest Is That Of The Legion Of The Damned. For Those

Of all the legends of the Imperium, one of the strangest is that of the Legion of the Damned. For those who know where to look, there are many corroborated accounts of these otherworldly warriors, their unexpected appearances upon a desperate battlefield, and their sudden and inexplicable disappearance at the battle's end.

Inquisitor D. Merloriac, Ordo Chronos

Never before or since have I seen fighting such as I witnessed when that host fell upon the Orks. Seizing the moment, I regrouped my company and led them once more into the fray, yet there was little work for us, for the Greenskins lacked stomach for the fight. Soon we secured the great bastion once more and without further loss. Of the dark brotherhood, there was no sign.

Witness Report by Varro Tigurius, Chief Librarian Ultramarines Chapter

They warrant further investigation, that much is certain. Their modus operandi bears similarities to that of... certain individuals we consider of extreme importance. It is not unheard of for those... lost to history to appear in a state that bears little relation to their original appearance. Given postmortem Auspex readings it is clear they have advanced telekinetic capacity, presumably psychic in origin. Upon stasis capture, I recommend extensive questioning within a quarantined null zone, performed by gifted Interrogator-Chaplains still attired in full battle plate.

Brother Amadeos of the Dark Angels Chapter's Elite 1st Company, the Deathwing

I personally believe them to be Warp-tainted, and therefore in need of the purging flame. But while they fight as allies of the Imperium, whilst they bring destruction to the foes of Mankind, well; their destruction remain a low priority - for me at least.

Brother Kargos, Knights of the Flame Chapter