Here are some ideas of how the mages might live. Pretty basic so far...

This one on the far right is partly inspired by Axel Erlandson's basket tree.
I bet the lighting inside would look quite interesting!
This one could do with more work in showing scale but it's only a sketch atm.


I'm liking the idea of this one, where the ground would be dug out to expose the
roots and make an entrance. The roots would be woven (somehow?!) to give it
some architectural structure and allow for creative designs.