Crystal Key

The Crystal Keys are used in the bonus of the Dasha Vestibule mission.

Description[]

There are three types of Crystal Keys:

Ruby Keys are dropped by the Ruby of Ahdashim in the Trial of Eternity (first) Chamber, and are used to open the Ruby Guarded Chest in the Trial of Wisdom Chamber.
Diamond Keys are dropped by the Diamond of Ahdashim in the Trial of Divinity (second) Chamber, and are used to open the Diamond Guarded Chest in the same chamber.
Sapphire Keys are dropped by the Sapphire of Ahdashim in the Trial of Wisdom (third) Chamber, and are used to open the Sapphire Guarded Chest in the Trial of Eternity Chamber.

Notes[]

Although it may seem odd that first and third keys are used to open the third and first chamber, there is no need for any extra backtracking in the mission since you have to go back through the first chamber to move on.