Prologue: The Rogue

Since the beginning of time, only a single element, Fire, Earth, Water, and Air, has been able to been used by a single bender. All Benders except the Avatar themself. But what would happen when a child, was born with an affinity to both the Elements of Fire and Earth. Ryu Kaizen is that child. After 15 years in his life he travels to a water tribe village. There he meets two peculiar people before awakening something VERY unexpected.