The Weirding Module is a sonic beam weapon that translates certain specific sounds into attacks of varying potency. The sounds that the device translates into attacks are presented as being somewhat rare. For that reason, everyone is startled when, during the training of the Fremen in the use of the Weirding Module, a devastating beam shoots from the weapon when the warrior wearing the device speaks Paul's Fremen name, "Muad'Dib," while wearing it. This prompts Paul to think "My own name is a killing word. Will it be a healing word as well?"