It's fine!

Psh, names xD I definitely agree with the possibly dangers of mary sue characters if its limited... However I do like the potion making being common and the runes not being so much. Then one of the characters can possibly be studying runes, or know a few, but overall less danger and also more limited magic rather than common, powerful magic. And I think potions being the healing type, with maybe other minor qualities, would also be good. Then the runes are definitely more powerful and needed as you can't just make a potion to be able to do something. So yup, I personally think that would work.

Very logical I think. And having explanations for the science behind everything rather than 'its just magic' and the like

That would certainly be interesting, making it a shock for some but not so much for others... I certainly think its a good idea. We'd need to decide which worlds know and which don't if we do this...

Yeah, that could work... Though thinking up prophecies is so difficult xD My skill at that is no better than when I was a young child with all the stupidly obvious prophecies

That's another idea, though when you say boundaries were lifted...? As in suddenly there are portal everywhere or suddenly the mirror fragments can be used for transport? I may just not be getting this one

Well, they're good ideas xD My replies are kind of; yup, awesome, interesting, good, I like them all but I can't decide which I like best. Today is an indecisive day (like every other isn't)