Based on the article about him in Coilhouse, this is punker than Cyberpunk 2020. And it gives me horrible terrible ideas for a game.
No kidding. We have here a badass mercenary captain who, in 1504 loses his arm, and gets it replaced by a masterpiece mechanical iron hand, one that lets him fight, gamble and write. He's also bad enough that he coins the phrase "kiss my ass" in response to a bishop. And probably gave him the mechanical finger.
So now I'm dreaming of a hardened, amoral mercenary unit during the hundred year's war, kept supplied by spring-powered artificial limbs by a reclusive genius. Combat arms, legs with internal holsters, eye patches with dart launchers...how far could you push this?