The Eternal Forgemaster is an armor crafter in the Fissure of Woe. He can be found inside the Temple of War, but getting to him and having him ready to make armor will take a lot of work. He is the only one who can craft Obsidian armor. To get the Forgemaster to craft armor, you must first complete the quest The Eternal Forgemaster, then complete the two Temple of War quests listed below. The Eternal Forgemaster crafts "blank" Obsidian armor which will accept Insignias and Runes.