The アバター is a powerful being who has been

reincarnated over many lifetimes. It is the

Avatar's duty to master all four elements, and to

use that power to keep balance amongst the four

nations. The Avatars follow a cycle, so when an

アバター dies the spirit is reborn the 次 nation

in the cycle: It goes Water, Earth, Fire, and

Air. There can only be one アバター at a time. The

アバター also possesses the ability to meditate

into the Spirit World. They are also able to

contact the spirits of 前 Avatars through

meditation and gain wisdom from them. The アバター

can also enter what is called "the アバター State."

In the アバター State, the アバター is at their most

powerful, but also their most vulnerable. The

アバター State is signified によって a glowing of the

eyes (and in Aang's case, glowing ARROW/アロー tattoos).

When in the アバター State, an Avatar's bending

strengh is heightened and he または she can perform

very powerful moves. But if an アバター is killed

while in the アバター State, the アバター cycle is

broken, and the アバター ceases to exist.