Quest:Elemental Bonds: The Vow

Objectives
Speak with Thrall at Nordrassil in Mount Hyjal.

Description
Before he passed through the portal to Mount Hyjal, Thrall asked you to follow him. There is something he would like you to witness.

Completion
Thanks to you, my friend - I live again!

And due to the combined efforts of the Cenarion Circle and the Earthen Ring - the World Tree will bring new life to Azeroth as well.

While Deathwing and the rest of the foes remain to be dealt with, I wish to share something with you.

Gains
You will receive:
 * 138800 XP (or at max level)
 * +1000 reputation with the Earthen Ring