Use the Seed of Revitalization at the Earthbinder's Circle to heal the land around the crystal. Then, return to Earthbinder Galandria Nightbreeze at the Cenarion Post in Hellfire Peninsula with any information that you gain.
It must be that the evil emanations from that giant crystal are summoning the mountain giants and driving them insane. It's too big to move, and beyond our ability to destroy, but I know a way to quell its power. I've summoned a circle at the northwest corner of the crystal on the ridge. Take this seed to the circle and channel its powers to heal the land through the natural forces of rain, growth and insect repopulation.
Beware, <name>, I sense an external force at play here... this is not natural!
Did it work? What did you learn? Did you find out who or what is behind what happened at Fallen Sky Ridge?
Prince Kael'thas has a hand in this?
<The earthbinder fumes.>
It is insanity what he has done! Dropping giant crystals from the sky and decimating the land can only be the work of a madman!
I can assure you, the Cenarion Expedition will counter any further attempts by their forces to do this ever again.
We owe you a great debt, <name>.
You will be able to choose one of these rewards:
Upon completion of this quest you will gain: