Empty Venom Sac

Source
This item drops from the following scorpids:
 * Scorpid Duneburrower in Tanaris
 * Venomtip Scorpid in Burning Steppes
 * Scorpid Tail Lasher in Tanaris
 * Deep Stinger in Blackrock Depths
 * Scorpid Hunter in Tanaris
 * Deadly Cleft Scorpid in Uldaman
 * Scorpid Dunestalker in Tanaris
 * Scorpok Stinger in Blasted Lands