Treasure Key

"Used to access the Queen's Crystal Barrows beneath the Prison of Elders."

- In-game description

A Treasure Key is a consumable rewarded for defeating Prison of Elders bosses and completing "Pack of Wolves" events during Patrol. It can used once to open a loot chest in the treasure room that is accessible immediately after completing a Prison of Elders challenge. Prison of Elders loot chests contain randomized loot.