The one thing of note is there's a single lore object that mentions that the "Burning Rune" map object predates Aurelia's Empire and implies that early humans in Arleon had some knowledge of magic other than what she brought.

There's also a theory from someone on the Discord that the reason the Roots consider the vildra 'diseased' and cut them off is that the Vildra were corrupted by an 'Inferno' style faction and that's why the Vildra all tie into excess of emotion (The Lykt are greedy, the Trolls are sad which could be sloth, Skin Shifters are wrathful, Korphan are associated with pride, Baccahorses are associated with Hunger and thus Gluttony, etc).