did you all thought about how magic works in Eternum? Like anyone that can play the game can use them if learned, but aren't those REAL worlds and all?
Maybe the Founder synthetized the worlds rules (prob using Idriel for it) and controlled them or smth.
Personal theory is that it's something similar to "Re: Creators" where a world basically has a sort of logic to it that allows certain things to happen. So some worlds allow magic to happen, some don't. And if you go against the logic of the world, the world tries to "correct" it (which is why certain worlds are starting to "rebel" against the presence of the players, whom they view as "anomalies").
Adding to this is that it's the projections that basically conjure up magic, and there's a sort of leveling system that unlocks the ability to cast higher-tier magic upon reaching certain levels. Personal theory on the matter is that levels are used to gauge the strength of the projection, and the higher the level the more the projection is able to "wield" some aspects of it to one's will (kinda like how lucid dreamers are able to control aspects of a dream). Compatibility rating, on the other hand, is more on how attuned a person is to Eternum itself, and the higher the rating, the better the "baseline stats" of a projection is but also the more likely a person is going to experience something like the bleeding effect. Again though, that's just my personal theory on the matter.
Also Orion has a chance to actually transport to Eternum without the neural implant, that's totally because of his 100% compatibility right? There's also a chance he could actually use his powers in the 'real world'
Most likely that 100% compatibility is reserved to "Immortals" (or those who have the potential to become one), but they alone don't have the monopoly of being transported to Eternum without the implant. The Andromeda tape about how the creators of Alien came up with the Xenomorph concept and William's infodump support the idea that some people have travelled to Eternum via dreams (albeit by happenstance and they often dismiss the experience as some wild dream) or possibly during near death (hence the reason why some cultures mistake it for the afterlife when Eternum is likely the realm they pass through BEFORE crossing to the afterlife via the Gates of Acheron).