The only thing that remains universal is the aetheric balance, and the ruins of the ancients. There are going to be ruins of the old world anywhere catastrophes and natural disasters didn't grind them to dust.

I also suspect that due to each shared having significantly less aether, they will be rather weak compared to those on hydaelen. Like how nobody on the first had ever summoned voidsent because they simply packed the aetheric density without literal generations of controlled breeding and planned marriages to cultivate mages strong enough to barely open the way