Legends Scatter, One Remains

Water, Earth, Fire, Air. Long ago the four kingdoms lived in peace, then everything changed when the Gods left behind a damaged Remnant, only the Avatars the guardians of the world kept the balance, but when dark clouds gathered, they vanished. Centuries have past and they became a legend... Until now. (Image belongs to me) (Sorry there are no ATLA or LOK characters... sorry again)