Avatar the last Air Bender: Dragon of the North (Completed)

Lü Bu is both a fire and waterbender who lives in the Southern Water Tribe with his friends Katara and Sokka but spent all his life with no memory of what happened to his parents or how he came to the tribe; at first the village treated him like an outsider due to him being a firebender but they soon treated him as one of their own as time grew. But after finding a boy trapped with a iceberg he embarks on a journey to help him master all four elements and save the world before the end of Summer. While Bu wants to understand where he's actually from and how much of an importance his parents were to the world.