Representation of a Obsidian prosthesis From the Organic Alchemy, a particuliar process was suggested to be used for those suffering from the lose of a limb, and capable to use the telepathy, to recreat equivalent to their lost limb so that they could regain all of their capacity. The suggestion was jugded fully possible, observations made on the way Arthur's Chitin reacted to Arthur's skin were used to mount a procedure that could prevent and possible rejections and nefast consequences. Such as the Obsidian poisoning / corruption that was diagnosed to Arthur from having worn and connected to his living armor which was not designed for this. The prosthesis made follow the same pattern as the The Obsidiant, which is to say an inside made of organic matter, a thin obsidian outer layer on continuous surfaces and visible organic matter at the joints. Due to the nature of the item, a direct contact between user and prothesis is required, meaning that the connection must be pro-actively done by the futur user, linking his prothesis to his flesh and bones. Even if anesthetics are used, the user having to focus during the operation imposes that heavy anesthetics compound can't be used, and so some level of pain resistance is to be needed.