Heres a tutorial on how to get the egg:go between the room where the nebby shop is,and where the little hallway with the door is,just keep going till u get into a weird room,go up,interact with the first tree,then go up and interact with the other one,then go up and right, (if you can't move on phone change your settings to another movement thingy,it happens to me too,idk if it happens on PC) anyways, interact with the purple doorframe thingy,Say "walk" (idk what happens if u choose the other option,thats up to You) and then just keep going on the path,and keep going right,then up then interact with the tree again,and he will give you an egg,if you go to your key items you can break it and there will be a note inside that you can read