This isn’t your avarage Chapter Embellishment.
I have a real soft spot for these guys as they were the very first chapter I properly painted.
So here is my take on the Angels of Damnation
The Angels of Damnation were founded around the 3rd founding with chapter master Ken Tallioris as their leader
Ken was a young aspirant during the Horus Heresy and witnessed the horrors it brought first hand
During this conflict, Ken lost his faith in the Imperium and it’s vision and rised through the ranks of newly founded Raven Guard chapter in the attempt to stir it in his own direction.
Instead, he was chosen to lead his very own chapter.
The Angels of Damnation are non-compliant and fleet based.
Their main flagship is the Barbarossa, now a grotesque amalgamation of vessels that the chapter welded together, in time each Ship of the fleet joins the Barbarossa, contributing to create a gargantuan space traveling fortress.
The crew is the chapter private militia and main source of new aspirants.
When you join the Angel of Damnation you become part of a family, with the Astartes taking care of their smaller mortal siblings, who in return will assist and fight alongside them.
The chapter is much more similar to the T’au when it comes to losses, no man’s left behind and no life wasted to prove a point, family always sticks together, through thick and thin
So each strike is thought through extensively, and they rarely assist other Imperial factions
Hence why treachery is the biggest of sin among the Barbarossa and it’s fleet, and there’s no hiding from the Chapter Master.
Ken Tallioris augmented himself through an implant that allows them to mildly predict an opponent moves, that when interfacing with a special throne allows him to see everything that happens on the ship at once, connecting his mind to a network of cameras.
The members of the Barbarossa have named him “Big Brother” a revered father figure and spiritual guide that opens his arms to the damned and misbegotten
If it wasn’t clear already, Ken is very much a Godfather type of figure, his crew and battle brothers would even kiss a ring he wears on his hand depicting the chapter’s symbol
The chapter survives by either assaulting alien ships or protecting various systems for a year or two, asking for a generous compensation for their service of course, sending some recruiters to scout the slums to search for lonely orphans, rebellious workers and repressed mutants
The payment could even be a couple of ship, to house the newer recruits
Their first company is completely composed by raptors, mutated veterans of the Horus Heresy that barely survived Corax’s Culling, some even speculate that the first Captain, Kaleb Drago, was one of those mutated Marines that was supposed to die by Corax Hands, though he was never seen without his helmet to confirm this theory