The user can purify any form of water, air, and earth (plant-life). The user also gets some control over water, wind, and plants. And considering the fact that you're helping the environment, plants and animals act favorably towards you. Also, the user gets animal hunting and taming talents. And since this is an "earthly" power, the user gets some healing powers as well. The water-factor allows the user to breathe underwater; and the air-factor allows the user to glide (not fly).