The Mantle of the Force, a potent crystal, was initially found by Suvam Tan and subsequently acquired by Revan. This crystal imbued a lightsaber with a cyan hue.
Close to the conclusion of his quest for the Star Forge, Revan obtained this crystal, along with the legendary Heart of the Guardian, from Suvam Tan. He learned that its attributes would change based on the other crystals present in the lightsaber, enhancing the areas that those crystals improved. It consistently amplified Force abilities, regardless of the other crystals.
This particular crystal is exclusively available for purchase at Yavin Station within the PC, mobile, and Nintendo Switch iterations of Star Wars: Knights of the Old Republic, costing 25,000 credits. Yavin is also accessible as downloadable content for the Xbox version. The unique silver-cyan blade color is exclusive to this crystal within the game.
In "Shadows and Light," Duron Qel-Droma experienced a vision that appeared to indicate Revan employed this crystal during his confrontation with Darth Malak. Nevertheless, this remains a contentious subject, as the vision possessed a blue coloration.