If you wish to turn these stones into a weapon to fight the Scourge, you must acquire something equally vile to fortify them.$b$bAn ancient evil lies hidden at the bottom of the Temple of Atal'Hakkar in the Swamp of Sorrows.  Release the creature there and destroy him, taking only a small part of his body back to Mehlar Dawnblade.  My guards will deliver the scourgestone fragments to Mehlar.