<< What I can't imagine is what can be the drive of the PC, apart from gaining power or knowledge. >>
That pretty much *is* the motive behind Zzaburi sorcerers when they cross over to the Sorcery Plane (technically, they don't 'heroquest', but the results are the same). Because their myths don't involve people doing things, just impersonal forces interacting there's nothing to be re-enacted. For them, trips to the Other Side are not an aspect of worship, as they are for the theists, because (by definition) they don't worship.
Which isn't to say you can't find a motive for them to gain power and knowledge, and drive the game that way. There is also nothing, in principle, to stop a sorcerer entering the God Plane and getting involved in more typical HQs - but of course, he'll be at a huge disadvantage, moth magically and in terms of his knowledge of the area.
Forward the glorious Red Army!
Trotsky
Powered by hypermail