The mirror Spock leads a mutiny on the ISS Enterprise

In the Mirror Universe, the mirror Spock followed the real universe Captain Kirk's advice. The mirror Spock led a mutiny on the ISS Enterprise. He led a mutiny against the mirror Captain Kirk. A fierce battle then ensued. The mirror Spock went into Kirk's quarters and found the Tantalus Device. The mirror Spock used the Tantalus Device on the mirror Kirk, killing him. After the mirror Kirk's death, the mirror Spock became the new captain of the ISS Enterprise.