Should be pointed out that Kronabis' prosthetic arm and wing started off as mundane replacements, then got worked with some basic clockwork/mechanical mechanisms, and eventually were upgraded over time into their current form, now with magitech integration, including a power source and link into his arm. The stub actually has a graft on it that links to his muscles, so him moving he arm actually activates things because it's linked into it, rather then through 'nerves' or something. It's cruder than that. Likewise, he had to train his 'nubs' basically to flex in different ways to activate other devices, or he has to manually activate them with his other arm.
That said, now that you mention magical power suits, I immediately wish I had a guy with one... good thing I love Kronabis so much, XD. If anyone has been playing Soulcalibur V, Aeon's fighting style in that was an inspiration for Kronabis, abet with only one axe and a metallic fist.