Doctor Chaotica's minions fire the death ray.
A "death ray" was a term often used on Earth when Humans fantasized about potentially hostile aliens from other planets.
When Quark was stuck in 20th century Earth, he threatened to harm Nurse Faith Garland with his death ray. However, as Lieutenant General Rex Denning observed, "It looks like a finger to me." (DS9: "Little Green Men")
In Tom Paris' The Adventures of Captain Proton holo-programs, Doctor Chaotica had a death ray in his Fortress of Doom. In an accidental conflict between the holodeck characters and photonic life-forms in 2375, the death ray in fact killed over fifty of the photonic aliens. (VOY: "Bride of Chaotica!")