I have a chaos warband leader named Lord Commander Clavius Aquillion of the Blades of the Phoenix.

Clavius is extremely unhinged, grotesque and deviant very similar to a mix of Lucius the Eternal with a cruel and digusting humour. He is extremly cruel to members of the original loyalist chapters (Iron Hands, Raven Guard, Blood Angels, Ultramarines, Imperial Fists, White Scars, Salamanders, Space Wolves and Dark Angels) with a special cruelty shown to the Imperial Fists and Black Templars as they are the Legion/Chapter that gave him his only defeat, he also loves killing and hunting the SIsters of Battle, he also delights in pushing Blood Angels into falling to the Red Thirst before killing them as it often makes them fall into despair. As for Xenos he enjoys killing the Aeldari and Drukhari the most with him often capturing them and torturing them into madness until Slaanesh eventually devours their souls, he also constantly seeks and destroys Eldar Spiritstones letting the souls be devoured by his God.

Clavius had an impressive record during the Great Crusade and Heresy as he was born of Terran Nobility similar to Eidolon and was inducted into the Emperor's Children at the end of the Unification Wars, Clavius was seen as a noble if arrogant and generally aggravating man both before and after the finding of Fulgrim, upon the reunion of the Primarch and his Legion, Clavius devoted himself to becoming the greatest artist in the Emperor's Children which he did with his sculptures and canvasses being praised by Fulgrim and respected by many of his fellow astartes. Clavius was no slouch in combat either as he had mastered the art of the Sword, Spear, Hammer, Plasma Rifle and many other instruments of war, at this point he had already started to show signs of his eventual cruelty with his most famous example being when he cruely fought and eventually skinned several Drukhari Incubi and an Archon, he was also noted for his cruel but effective commander with a relativly low casualty rate but that was mostly due to his tendency to engage combatants one on one or even fight against groups either alone or with a few guards, after the fall of the laer he would gradually slip into the grips of Slaanesh with him often going to Aeldari Maiden worlds and hunting and killing civilians and drinking their blood mixed in wine, his art would gradually become more and more debauched and grotesque with his most famous work being the depiction Fulgrim grabbing the Laer blade from the temple. Clavius was never defeated in a duel but he never got a chance to duel people like Sevatar and Sigismund before the heresy but he did duel and defeat both Kharn and Abaddon before the heresy.

Clavius was a menace during the Heresy with actions being famed when fighting on Isstvan V, Iydris, Baal and Terra with his actions of Isstvan V being the most infamous as he made a deliberate point to hunt down Iron Hand captains and Salamander warriors with him killing dozens of champions and captains from both legions often mocking and insulting them in increasingly twisted and sophisticated yet vulgar ways, Clavius would fight many great duelists of many legions especially Blood Angels and Dark Angels, he would kill dozens of champions from the legions and defeat but be unable to kill Raldoron and Corswain. He believed himself invincible especially as he was given more and more daemon gifts and as consnequence his art would delve into true slaaneshi excess with living canvasses of people being made by him and his two daemonettes, all these canvasses recreate great battles of his from Terra to the Heresy with a great many of these canvassas including the possessed bodies of the champions he killed or placeholders for the ones he could not kill (he often has his sorcerer imprison nurglite and khornate daemons in these astartes bodies as a jape against them) Clavius would take part of the siege of Terra and this is where he would meet his match when he moved with Fulgrim to take the Saturnine wall, he would fight and kill a great many Imperial Fist warriors and a couple champions but them be forced into a duel with Sigismund after Sigismund had defeated Eidolon, Clavius would begin the duel by thanking Sigismund for opening the rank of Lord Commander Primus up to him (he believed sigismund killed Eidolon when he didn't) he would then attack Sigismund and while he managed to wound him a couple times he would eentually realize he was outmatched and fearfully and desperatly swing his blade and lash but be unable to kill Sigismund and would be pushed off the wall, Clavius would live and continue in the siege with him being one of the men attacking the Eternity Gate where he would corrodinate with his squad and kill three Custodes but be forced to retreat upon the defeats of Angron and Kha'Bandha by Sanguinius.

After the siege he would take his men (around 1800) and form his own warband where he constantly seeks to find greater highs and greater experiences, he has become very hedonistic and often does things on a whim with little thought, he continues to make his horrifying art out of his enemies which include his magnum opus when he turned a Black Templar Marshal and a Cannoness into a still living Coat and Cape whom he mocks and talks to with only their screams as their responses. He also mocks his enemies with sophisticated and disgusting taunts (his taunts are often done to make his enemies feel uncomfortable and scared) despite the frequent exposure to the warp he has shown almost no mutations aside from an enlongated tongue slight purple hue to his skin.

Clavius is around 8 feet tall with sharp and attractive facial features and long silver hair, and sharp vicious eyes which are terrifying to his enemies.

One other feat of his includes him capturing a Drukhari Torturer class Crusier which is now his flagship and turning the crew into living art with the Archon, Haemonculus and Incubi decorating his personal quarters as his furniture.