The more we talk about it the more Im hoping it's a more specific and unique Artifact, rather than just a bunch of Mordite under mental control.
Naw, complete opposite here. It being some artifact any fool could put on would be lame. Having a few chunks of literally death floating around his head is cool. It's a monument to his constant and unbending Willpower and self control. A single stray though means death, yet he's just walking around with it on his head anyway. He must have supreme confidence that *no one* could overpower his Will and kill him (and you *know* all his prisoners try like, all the time). And with all that, he doesn't even have to cast a spell to take someone out, just think in their direction too hard.
It's the most extreme way to say: "Come at me bro".