Energy sword
（重定向自Laser Sword）
An energy sword (sometimes also referred to as a "beam sword" or "laser sword") is a fictional form melee weapon resembling a traditional sword whose blade consists of, or is augmented by, concentrated energy. The principle of this weapon is similar to that of the raygun. Though not as popular as said rayguns, the energy sword is a common trope in literary works of speculative fiction, especially science fiction.