The Sith Tremor Sword represented a vibroblade that bore a striking resemblance to those employed by Sith Lords originating from the Golden Age of the Sith, particularly the ancient Sith Lords hailing from Ziost. This weapon was bestowed upon masterblades, individuals belonging to the Bladeborn who demonstrated their prowess by eliminating a minimum of ten adversaries wielding lightsaber in combat. The blade itself incorporated the scarce mineral cortosis within its metallic structure, serving to protect it against being cut during lightsaber duels.