Given the differences between the way the worlds work (Ice Magic, Combustion, and many others) it seems odd that planeswalking is possible.
If simple chemical processes like combustion don’t work in the other world, how is it that the countless complex biochemical processes that make life possible do? I have crossed between the two worlds many times, and breathed the air of both worlds with the same set of lungs. In my travels to that place I have eaten grilled manticore steaks (yum!), fillet of basilisk (over rated), and deep-fried hippogriff (not worth the calories), and digested them and drew sustenance from them without trouble.
Likewise, my friend Te-jun has accompanied me discreetly a few times into our world, and he didn’t have any trouble either. Even though, as their own scholars say, every living thing has at least trace amounts of that other world’s “fire” element in them, whatever differences between the worlds that make Fire Magic inert here apparently don’t effect how it works as part of their metabolism (or “life force” as they call it). He was able to eat all kinds of things: glazed ham, Caesar salad, French fries, Kale smoothies, a bowl of Cheerios… and although he had some opinions about them that surprised me, it didn’t effect him any differently than food from his own world.
Can all life cross between the worlds and survive? Or just humans? If a hippogriff came to this world, would it die instantly if some necessary magical part of its life force couldn’t work here? Or would it die slowly? Or would it’s body adapt somehow, maybe suffering as it acclimated to the different scientific and magical laws, and feel fine after adjusting?
Wonderings aside, I do not feel comfortable with the idea of carrying out such an experiment. It never occurred to me to worry about it when I brought Te-jun over for a visit. In hindsight I suppose that was reckless. But for their sakes, I won’t take the risk of inviting any of my Elven or Dwarven friends to this universe.
–Notes from a Senior Planeswalker’s Private Journal.