[@Ammokkx]

1. Yes, this is possible. Your wizard-types in the Age of Dawn generally study magic from ancient relics and texts, or in some cases draw power directly from them. However, unless there is some sort of entity within the artifact or associate with it, it will function only really as a power source. Your character would still need to learn magic. You'll also need to explain the origin of such an artifact, or justify its existence; who made it and for what purpose.

2. I don't have any problem with that. Sounds kinda cool.

3. Yyyyyes, but it really depends on where you look. Most of Borea has scattered druidic temples from before their conquest by the Atlanteans, Iiram is full of ruins of their ridiculously old empire, Hyperborea has a variety of ancient shrines dedicated to their gods, and Lemuria is filled with all kinds of weird shit. There's also the ruins of ancient Atlantis, but those are under the sea.

4. This I don't like as much. In combination with what you've mentioned previously, it makes me think of a cross between Killer 7 and the infinity gauntlet.

5. What's important to recognize here is that Thule does not exist as a nation in the Age of Dawn, and hasn't in for over 50 years. If your character were a soldier for some nascent state that balkanized from Thule, all of those details would be up to you.