Tantalus field

In the mirror universe, the Tantalus Field is an alien device that vaporizes victims at the touch of a button. James Kirk used it to become captain of the ISS Enterprise.It was one of the secrets that Tiberius was able to gain from the First Federation representative Balok before he was killed.The field was apparently a secret from everyone except Marlena Moreau, and to others it seemed that Kirk's enemies had a tendency to "simply disappear." The field was used by Moreau to save the "original" Kirk when he was trapped in the mirror universe.Spock took possession of the device upon his assassination of Kirk and used it to eliminate his political enemies, including a mutinous Uhura and Empress Hoshi Sato III.