Guile of the Raptor is the sixth step in the Hammerfall quest chain. Once completed, wait a few seconds and the final part will become available.
Take this orb and use its energy to give Gor'mul the essence of the raptor. Surely this will invigorate his spirit and give him new purpose in life. With him returned to normal, we can explain to him the current state of the Horde, and we will have a great warrior's assistance in our unceasing battles.
Returned again have you? Indeed there is nothing more I could wish for now than more of Tor'gan's pity.
What have you for me this time? Perhaps a piece of brightly colored string? Or a length of rope to end this misery of mine...
At least it is something interesting you bring to me this time. A strange power it emits...