"Dungeons make affinity mats in general, including metals. It's theoretically possible to give mats affinities without a dungeon it's way harder, unless you're trying to literally make Water-affinity water or Metal-affinity metal. The weird parts of your creation wouldn't be that they were enchanted metal, it would be that they were enchanted metal without an affinity."
"Maybe it wouldn't look affinityless, though? I don't know very much at all about your magic at this point."
"Is wearing headbands mandatory for your Companions? I might have - at least some questions about what they do to people, you've discussed concepts like 'soul' that sound like they take parts of a person's mind out of them and, do something with them, and - this is not a kind of magic I find familiar."