
Special Beam Cannon (魔貫光殺砲, Makankōsappō; English "Light of Death"; Literally meaning "Demon Impaling Light Killing Gun") is an energy wave technique in the Dragon Ball franchise. It made its debut in "Gohan's Hidden Powers", the 4th episode of Dragon Ball Z, which premiered on May 17, 1989. The technique is a very powerful laser beam created by Piccolo as a way to destroy his then-arch-enemy, Goku. Piccolo first used the Special Beam Cannon in the battle against Raditz, killing both him and Goku in one shot.
The move is performed by touching the index and middle fingers of one hand to the forehead and charging enough energy to attack. Its speed changes to the power level of the person preforming the move. When ready, the fingers are extended forward, the attacker shouts the name of the attack and two thin ki beams are unleashed from the fingers. One remains straight while the other coils around the straight beam. The resulting beam is quite powerful, drilling through most targets, and exploding on the ones it can't. It can also be used with only one arm (as when Piccolo used it the for first time). The main disadvantage of the attack is the time required to build up enough energy for the highly focused burst, however, with enough concentration, this can be bypassed. It is the first technique in the series to be referred to as being faster than light, as Piccolo reasoned that Raditz had to be "faster than the speed of light" to evade it.
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“Big talk from a woman who looks like death warmed over, lady. I guess a good hard whack from the ugly stick’ll do that to a person, huh? But didja really have to go back for seconds?”