Dryads
Plants exist in a different world to people. They change the landscape slowly, over years and generations. They are the land - they do not claim it.
But they want to learn.
Dryads have already learnt to own a forest, and all who wander through are subjects.
HD 3 / AC as Chain / Damage 1d6*
*May use mind-control magic with all the distressing implications that entails.
Expanded, revised & collected: