This sigil was given to me by a messenger from our priest trainer, Shanda. It seems Shanda would have words with you when you have a moment. Read it and bring it to her afterwards.
Do not concern yourself with the world below Teldrassil for now. There will be time for that later. Go now and speak to the others in Shadowglen--they can tell you more about what events have transpired. Help them in any way you can, and anytime you feel you need more training, come back to me and I will teach you what I can.