Pridewing Venom Sac

Source
This item dropped from the following wyverns in Stonetalon Mountains:
 * Pridewing Patriarch
 * Pridewing Wyvern
 * Pridewing Skyhunter
 * Sorrow Wing
 * Young Pridewing
 * Pridewing Consort

As a quest objective
This item was an objective of Pridewings of Stonetalon.