Barbarian Instinct: Ligneous

Your rage is powered by the steady growth of the natural world, from the blossoming of flowers to the cultivation of vegetables and the towering, imposing might of the grandest trees. You might be descended from powerful druids or dryads, been exposed to powerful primal magic, or been transformed by the resurgence of the Plane of Wood. As you unleash your rage, your flesh becomes covered in woody growths, which spread like bark across your body.