Fill the Amethyst Phial and bring it back to Corithras Moonrage in Dolanaar.
All was not well with Teldrassil, however. Staghelm's carefully made plans for the new World Tree had borne out as he had hoped, but there was one small problem, a problem to which many of the troubles on Teldrassil may be attributed.
However, I will not get into that yet. You must visit the last moonwell, to the northwest in the Oracle Glade. Under the boughs of the Oracle Tree lies the first and most powerful of our wells. Retrieve a phial of its water and return to me.