To find the golden egg you need the tf form with the ability to climb up big trees, I think that will point you in the right direction. The elf isn't hard to find once you are able to get into the northern plains.
A site like this would work for example. https://ufile.io/
Also can you maybe explain how you managed to get stuck, if you can think of anything since no one else manaegd to get softlocked there yet.
Oh wait did you try to use the chimney to get down?
https://ufile.io/b8fx9oi6, I've been up and down the chimney I'm having difficulty getting through the locked door & and over the gap to the temporal rift.