Take the Flask of Purest Water to Farseer Nobundo inside the Exodar on Azuremyst Isle.
I held back a little of the water from Ashenvale, not because I doubted your ability to deal with the situation. Rather, I knew that you would succeed, and I wanted to make sure that you had something special to take back to Nobundo.
Here, [player], take this flask of pure water. It will ensure that you receive a very powerful water totem.
Farseer Nobundo awaits your return at the Exodar.