The Crystal Keepers

Loki is all too familiar with the forces of good and evil, since she watched them clash among certain members of her family. Her brother joins the Guardians of Light while her sister joins the Brethren of Darkness, two orders that hunger for more power over the world and each other. Neither sibling is aware that Loki is at the center of a secret order whose sole mission is to keep the world in balance and prevent total destruction.