Hierarch Asterios:
I am so sorry to put such a burden on a young Elf like you. But it is your fate that you must carry on with.
Please, Find the Water of Life and give life to the Mother Tree once more. The process of finding the water will itself be a painful task that requires patience and sacrifice. I will give you this amulet which contains the blessing of the Mother Tree guardians, so keep it safe with you.
Thalia and her sisters know more than anyone else about the Water of Life. Ask for their help. Take this letter that I give you and meet her. You can find her in the eastern part of the Iris Lake.