Lucius earned his renown as a warrior of consummate skill even in the days before the Legion's fall, a duellist whose arrogance was matched only by his talent. His pride was legendary and his need to be acknowledged as the finest blade in the galaxy consumed him utterly. This vanity, sharpened by his devotion to Slaanesh, would define his damned existence.
Through dark pact and the favour of the Dark Prince, Lucius came to possess a terrible gift that is also his curse. When he is slain, he does not truly die. Instead, his essence passes into the body of the one who killed him, provided that the victor feels even the faintest thrill of pride or satisfaction at having bested him. That fleeting emotion is the doorway through which Lucius returns, remaking the slayer's flesh into his own and consuming their identity entirely. Only an opponent who can kill him while feeling nothing at all, no triumph, no relief, no pride, can end him forever, and such perfect detachment is almost impossible to achieve.
This makes Lucius a nightmarish adversary. To defeat him in single combat is not victory but doom, for the price of killing him is to become him. His enemies face an impossible dilemma: to lose is to die, and to win is to be devoured. The bodies of those who have slain him over the centuries are said to writhe beneath his features, their faces frozen in silent agony upon his skin, trophies of every foe who ever bested him only to be claimed.
Driven by insatiable vanity, Lucius roams the galaxy in search of ever greater challenges, seeking out master swordsmen and legendary champions so that he may prove his supremacy against them. Victory brings him exquisite pleasure, but he almost welcomes death as well, for each resurrection is a fresh affirmation of his eternal, unkillable nature. He is a creature of pure ego, a duellist for whom the contest itself is the highest sensation, and he pursues it with a devotion that borders on worship.
Beneath the swagger and the deathless boasting lies the same hollow hunger that afflicts all his Legion. Lucius has perfected the art of the blade and cheated death itself, yet no triumph ever satisfies him for long, and so he fights on without end, a faultless and cursed champion doomed to seek a perfection that his own eternity denies him.