Talk to Daryn Lightwind in Rut'theran Village.
While the ruins of Feralas can be quite dangerous, they have much to tell of what has happened here.
Searching through the rubble to the south a few days ago, I discovered what appears to be a normal stave. However, I just can't shake the feeling that there is something more to it. Angelas and I have been poring over our books here, but we can't find a thing about it.
I have a colleague in Darnassus that may be able to tell us what this is, [player]. Why don't you go talk to her and see if she can help us?