I love the idea already! I just read an article on how all of Europe was covered in primeval forest before we went and discovered agriculture. (And then the murders began)
If I may suggest, maybe it would be good if you figure out for yourself what caused the Stille and why. Just to avoid ending up in contradictions. It doesn’t matter if the characters and the readers never learn it, but the author should know. Just saying… Then of course it’s entirely possible you have very robust world building already!
Also, are you and NightMareMage friends otherwise? Thy seem to be commenting on your work, which is not available yet?
Annnnyways, I wish you luck and perseverance! Both are needed in addition to the talent. I’m looking forward to reading it!