The Prison's Casing

The Hederine demons that occupy the foothills of Mount Hyjal secrete powerful fel poisons, which if left to mature, harden into a dense anti-magic crystal. These crystals have come to be known as Tears of the Hederine. Not even the immense power of a Doomguard could break the walls of a prison constructed from this material. Travel to Darkwhisper Gorge in Winterspring and recover the Tears.