After being banished from his home, he learned to coexist with the spirits and decided to help bring balance between them and the rest of mankind.[4] This quest eventually led to him becoming the first Avatar by fusing with Raava, the spirit of light and peace, to defeat Vaatu, the spirit of darkness and chaos. As the Avatar, Wan sealed the spirit portals to avoid future conflicts between spirits and humans, and spent the rest of his life in an attempt to achieve a peaceful coexistence among humanity.Wan declaring his life's goal: THIS IS MY MISSION: TO USE RAAVA'S LIGHT SPIRIT TO GUIDE THE WORLD TOWARD PEACE