Halo and or rwby in ruby he can learn more magic and abour
T semblence,grim and in halo he can learn new technologies and may the secrets of the race that the forunners killed off
I’d say do the Primal workd but hide secrets in it. Like spiritual beasts that can cultivate Qi in only the rarest of spots on warth. If you do that, once Zephyr goes back to the game world maybe he could make split factions between cultivators and mages or whatever.
A combination of Primal world and RWBY, why? Cause why not, oh and maybe make some able to cultivate Qi so the MC would be reminded of Cultivators and make factions in the game, and make cultivators a faction.
Guess I'll parrot what I said in my RE paragraph comment. This'll be a great world to bring the plaige doctor to. Not to mention all the other entities within. (give the rest of those comments a gander, some decent ideas within.)
a lot of good ones, with some of them having barely any fanfics but they picked the most overused, boring, world because it's what they like by making good excuses to have what they want. im probably gonna drop this until the next world after halo.