The crystal of Freedon Nadd was a blue lightsaber crystal, powered by the Krath Lord when he was a Jedi. The crystal itself was made to focus the light power in the user, and to fight the dark side that would surround its bearer. Freedon Nadd created such a crystal to protect himself from the dark side. However, Nadd ended up falling to the dark side regardless. Since the crystal was against him, the Krath Lord was forced to let go of his powerful creation. Devon used the crystal to defeat Darth Revan, in the ultimate duel between the Jedi Knight and the Dark Lord.