Stark white roots like that of the Gulthias Tree purified twist around your wrists when summoned, engulfing your forearms. These roots twist and writhe creating thick bracers of rock hard knots. Twice a day (for 10min each time) these roots can be called upon forming circular shields on your forearms increasing your AC by 2, while not hindering your hands or limiting their use.
When climbing on natural surfaces they also extend from your hands, burying into the stone, earth or wood. Giving you Advantage on all Athletics checks.