Warhammer 40,000 Emperor's Children: Lucius The Eternal

Perhaps* the greatest duellest in the whole galaxy, Lucius the Eternal is as arrogant as he is cruel, seeking to humiliate the most skilled opponents in battle. Quite how he factors a semi-sentient daemonic lash into the equation is up for debate, but given he’s using the Blade of the Laer, and has the ability to take over the bodies of those who do kill him, we’re not sure he’s really interested in playing fair.