Complex sentence: Kaluu's magic derives not only from personal, universal and dimensional powers: he has powers gained through the tapping of the life forces of living beings and the manipulation of the environment in certain ways that have destructive side effects.
Split into simpler sentences: Kaluu's magic derived not only from personal, universal and dimensional powers. He have powers gained through the tapping of the life forces of living beings and the manipulation of the environment in certain ways that have destructive side effects.