Water. Earth. Fire. Air.

. . . . "Long ago, the nations lived together in harmony . Then, everything changed when the Fire Nation attacked. Only the Avatar , master of all elements , could stop them, but when the world needed him most, he vanished . A hundred years passed and my brother and I discovered the new Avatar, a light mage named Lux . And although her magic skills are great , she has a lot to learn before she's ready to save anyone . But I believe Lux can save the world ."