High Frequency Blades or HF Blades are swords reinfored by a powerful alternating curent and resonates at extremely high frequencies. It weakens the molecular bonds of anything that it cuts which increases its cutting abillity. It is usually used be cyborg ninjas like Raiden.
Conection with All-Stars[]
Raiden uses the blade for almost all of his attacks and holds during battle. In the opening Raiden uses it to deflect Coles lightning blast and trys to cut MacGrath in half, It also appears in all of Raiden's icons.