Also known as: 魔貫光殺砲
魔貫光殺砲 (Makan Kousappō - Demonic Piercing Light Killer Cannon) is Piccolo's Energy Beam attack from his two fingers. Also used by Son Gohan in his Gohan Beast form.
Translated word is "Light of Death" in the comics, or "Special Beam Cannon" in the English dub.