Members of the Order of Shasa were required to construct their Fira sword from metals found in the wreckage of a kolto harvester located in the Hrakert Rift. The harvester's hull plating contained cortosis ore, making the Fira blade invulnerable to a lightsaber. The cortosis metal had to be shaped in the heat of underwater volcanic vents, making the construction of the Fira a dangerous and time-consuming task.