Planar-Forges

Built from the mixing of several different materials infused with the energy of the inner planes, outer planes and all planes in between. The Planar-Forges are an exceptionally creation of the creatures from the dreaming planes that is treated with reverence and NOTORIOUSLY difficult to create weapons from.
Part of their difficulty is that the planar forges are either created by The Quori and The Nocta Mori and so the forges contain their organic forming of concepts, eventually, these simple smithing spaces dug themselves into the ground and become a nest or breeding zone for the realised creatures of the Quori and Nocta Mori, over centuries of this breeding and gaining consciousness, the Planar Forges now represent dungeons to overcome filled with traps and enemies that are ever-changing and constantly learning. However, adventurers that can reach the heart of these dungeons will find the planar forge and it's endless possibilities in weapon creation waiting for them. 
There are very few living adventurers who have reached the heart of the planar forges... though Baron Stone-Tearer is rumoured to have built his eyes from the forges...
It is believed that these forges can create weapons of unknowable power, though any who have attempted to use it and not succeeded in creating a legendary weapon, have been brutally cursed for their arrogance in using the forge.