Wyrmtongue's Cache Key

Source
This item is a reward from the following quests: This item is also bought from Treasure Master Iks'reeged in the Secret Treasure Lair in the Broken Shore for 2,000 Nethershard.
 * The Motherlode (quest)
 * Treasure Master Iks'reeged (quest)

Use
This item can be used to open any of the Curious Wyrmtongue Caches in the Secret Treasure Lair in the Broken Shore.