Talk:Aang/@comment-12.205.25.11-20110816162147/@comment-2241341-20110816165053

Bloodbending isnt really an advanced sub-element to waterbending, waterbenders dont use it often because it considered a dark form of waterbending, and they can only do it in the full moon.

Theres really no such thing as Sound Bending, the closest Aang's got to that was when he blow in the whistle to call all the zoo animals be didnt sound bend he just gathered a lot of air.

The only 2 advanced sub-elements is metal-bending and lightning-bending.