Maybe, but what does that have to do with PtH?
An interesting question is how much the Aesir know about/have used magic in the past.
I should also point out that Mrearan magic and Aetherian magic [the Aether is the common name of what I've always referred to as "the magic world" of Earth] are two different although similar things.
I can't really say similar in what ways unless Deac cares to explain exactly how Mrearan magic works, which isn't really relevant at this time.
I need to explain how Aetherian magic works myself, but I can put that off until PtH VI.