Unlocking Sub Elements

Overview
Sub elements are an additional set of bending moves that are different for each element. You unlock the ability to choose a sub element at level 50. Then as you continue to level up you will unlock more sub element skills just like your normal bending abilities. You are free to choose a new sub element any time you reset your character. As of November 2020 there is no way to save different movesets for each sub element. You can however save one moveset each for northern and southern style water bending.