It is based on Picrocerus Armatus. Koyuxerus has two massive, hammer-like greenish turquoise claws with smaller scissor fingers that are sharp. The midnight blue body is covered by ice crystals. Big crystals grow on the back around the biggest one but the tail, the claws and the upper segments of the legs have ice crystals too. Unusual for Carapaceons Koyuxerus evolved a broad tail that is unprotected by shell but could evolve through the ice covering it and protecting it. The legs have big spikes on the uppermost segment, amount reducing with each next segment.