Illustrious primarch of the III Legion, turned renegade because the Imperium sucks. Experiencing pleasure unheard of and killing things since M31. Before that crusading and stuff.
Dark Scribe of the 38th Company, Iron Warriors Legion, come to bring the glory of Chaos to the realm of Pony.
Not being the best? That's a decimating. Not wearing Chevrons? That's a decimating. Fighting for the Emperor? That's a decimating. Liking Imperial Fists? Oh...you better believe that's a decimating.
Clowns to the left of me, jokers to the right, here I am.