Tremor Sword
the origins of the bladed weapon could be traced back to the members of the Bladeborn, those Sith who devoted themselves to the mastery of swordfighting with steel weapons instead of lightsabers. The blade of a tremor sword was laced with cortosis ore for added strength against lightsabers. Only those Bladeborn who survived ten duels with a lightsaber-wielding opponent - known as masterblades - were awarded a tremor sword, as a sign of honor and recognition.