After checking out every last piece of wood contained within his shop, he chose a piece that was similar to Ironwood but infused with a fair amount of mana that made it even more durable. It would be excellent as a first draft due to the durability it would gain from the rune scheme he was planning.
With the wood selected, he pointed at it while looking at Azazel, "Take that piece to the wood working area."
Azazel picked up the piece of wood with ease and examined it for a moment before smiling, "Ah, Underworld Ironwood. Pretty common but it's decently hard and looks nice when treated properly." He carried it as he followed Junichiro into the wood working section, "So, you're making a replacement with wood then?"
Junichiro glanced at Azazel then looked away and continued to walk the short distance to the vast collection of machines and tools for working with wood, "I plan to essentially make a puppet arm and control it through runes that will give it the ability to read my intentions."
Left unsaid was how awkward such a setup would be. He would lack all feeling in his arm, it would be weaker than his original arm, and that didn't even take into account another thousand little things that would likely annoy the hell out of him. He didn't want to dwell though. Only thinking about making the arm was keeping him from slipping into depression and he knew it. He had to keep focused and keep himself distracted or the memories would come back to him. He was only thirteen, he wasn't supposed to be dealing with these kinds of issues!
Junichiro looked over the various tools Azazel had provided him and saw everything he would need in order to make the simplistic arm. But first, something he had never tried before had to happen. He took a deep breath to calm his nerves and close his eyes so he could focus. He kept his breathing even as he reached for his magical power and his ability to form tools out of nothing. He had made use of this ability almost constantly as the tools provided by it had a quality directly proportional to his mana supplies. The more he could spend on the tool, the higher its quality. Now he was trying to make the highest quality tool ever created.
A human hand.
He'd remembered a simple spell that had a lot of uses in many different kinds off roleplaying games and decided he needed to emulate it, the Mage Hand. In theory the spell was supposed to be super simple, and for all he knew it was. However, he had knowledge of zero spells. He had no experience or knowledge on how to cast any spells so he was relying on the one magical talent that was fairly overt, his tool conjuration.
He felt his mana drain and quickly opened his eyes, sitting in front of him was a softly glowing blue hand. With an excited grin, Junichiro tried willing the hand to move and pick up one of the smaller chisels siting nearby. He focused and waited... but nothing happened. With a grunt of annoyance, he dismissed the hand. Sure, he could conjure a hand, but it was just as solid and unmoving as the other tools he'd conjured. He had no telekinetic control over them and no ability to change their shape after he summoned them. That was a complete waste of almost half of his mana.
Azazel remained silent watching Junichiro conjure a magical hand and then dismiss it. He knew about Junichiro's ability to conjure tools, it was apparently the only magic he knew, so it was only a small surprise to see the hand. Though it obviously hadn't worked out.
Junichiro quickly got over the failure and looked at Azazel, "Alright, lets get to work. The first step will be turning that log into the pieces of an arm and hand. We'll start with the larger pieces, like the upper arm and forearm, then move to the more delicate pieces like the articulating fingers.
It only took a couple of hours for the two of them to make the eighteen pieces that Junichiro wanted for the artificial limb. Three pieces for each finger, two for the thumb, two for the palm, one for the forearm, and one for the upper arm. Each joint was designed to be articulated and had spots drilled so they could be slotted together and pinned in place. It was far from a beautiful piece of work. The wood was still rough from the quick sanding to shape it, and he had zero plans to do anything to beautify it. No, there was no point in taking hours to make sure every piece was buttery smooth to the touch.