Speak with Baron Sablemane at the Circle of Blood in the Blade's Edge Mountains.
This is bad news. Gorgrom the Dragon-Eater is behind the recent Bloodmaul plans against Sylvanaar!
Why he's manipulating them, and not just using the Bladespire, I don't know. But if we're to deal with a gronn, we're going to need help.
I know a man who is wise in the ways of all sorts of exotic magics. Baron Sablemane is his name, and you can find him at the Circle of Blood, back down the ramp to the northwest, and then southwest through the canyon.