The warband of Chaos Space Marines known as Skyrar's Dark Wolves are a possible splinter faction of formerly Loyalist Space Wolves Space Marines who turned to the Dark Gods. They were first sighted by Imperial forces operating in the Fenris Sector.
Like all of the Space Marines in the Traitor Legions, these troops were slowly and insidiously corrupted by the Chaos Gods so that, step by step, they were turned into something all together the opposite of what they had once been. Where there had once been proud, noble Space Marine warriors, there now stood the vain, selfish creatures that quickly became known by both themselves and their enemies simply as Raptors.
thetalkingpoltergeist: Aaron Bowden Dembski just posted this on his Facebook page and I am twitching in pleasure. Sevatar, baby, you look so good when you’re murdering everything. Look, fellow claw-kin. Enjoy this wonderful art of the 1st Captain.