Magma Forge

The Magma forge was an Ancient Aedra Forge beneath Red Mountain with the Ability to craft Aedra Weapons. Reyenirus Battlehorn travelled to the Forge and spoke with the Forge Bearer before crafting Frostbane.
Due to the nature of giving a Godly weapon to that of a Mortal, the Aedra punished the Forge Bearer, and destroyed the Forge after Reyenirus Battlehorn left with his new Weapon.