A professor of ancient languages discovers an amulet dedicated to a forgotten god. The artifact has a variety of powers, but the most notable is the ability to kill anyone with a single word. A classic Mythos story? No, it's the plot of an obscure fantasy comedy from the early 60s.
CoastCon Fan has a look at the William Castle film "Zotz!". One of the gimmicks of the original theatrical run was a surprisingly well done reproduction of the magical amulet that drives the story.