Go to Shadowfang Keep and obtain the Springvale's Sharpening Stone from Commander Springvale, 5 crates of Moonsteel Ingots, and 5 Deathless Sinew.
SI:7 has been watching your progress with interest. You service to the Alliance is well-known and tales of your deeds have reached the king's ears.
In recognition of your service, King Wrynn has commissioned the royal armorer to forge a special weapon.
The cursed Shadowfang Keep in Silverpine Forest is home to the exotic materials for your weapon. Travel there and recover Commander Springvale's sharpening stone, a supply of moonsteel ingots, and sinew from the ghouls and geists infesting the keep.