Tree is one of the rooms in Aeternis.
Background
Perhaps one of the strangest sights underground, the tree maze is a transition area, filled with scorpions and featuring a massive tree that thrived underground thanks to the grailstone providing sustenance and illumination.
Layout
A confusing layout, to be sure. While it might seem like you have to climb the tree, avoid it. It's full of scorpions. Navigate the perimeter and you should have no problems reaching where you need to be.