Raava is fused with Wan to become the Avatar Spirit .
Raava and Vaatu 's battle was a visual reference to the Chinese Yin Yang symbol , a similar reference was made in the original series with the Ocean and Moon spirits ' koi form ( see below ) .
reference is fused with Wan to become the Avatar Spirit .
Raava and Vaatu 's battle was a visual reference to the Chinese Yin Yang symbol , a similar reference was made in the original series with the Ocean and Moon spirits ' koi form ( see below ) .