Apologies for the delayed response!
The way I've kind of been thinking about the world building is somewhat akin to what I do for my own ttrpgs. Generally I like having deities as real beings, but stories about them may or may not be true. In this case, Orena is real, is still around/in existence, but I don't know/hadn't decided on whether that bit about the river was true. Mostly I wanted to have it bc it's based off of the spring in Delphi, which I was able to visit and drink from myself while I was there. (The same folklore exists about creativity after drinking the water, and the Pythia used to bathe in its water before doing sessions.)
And thank you so much! I can't take much credit for it - I only have minimal experience with playing text games like this, and this was the implimentation I saw that I liked, so I'm just echoing what's come before me and worked. :) It's definitely a sleek way to implement the possibility for more lore and world building that players can choose to dive further into or not