Darth Vader, aside from being the Emperor’s right hand man, was undoubtedly one of the most feared Sith apprentices of all time.
It came as a surprise, then, to learn that in the Emperor’s greed and lust for total power, he had back ups… replacements should Vader ever weaken his resolve in the Dark Side of the force. If ever Vader became less ruthless or less murderous, then the Emperor would put him down, like a pet that he no longer wanted, and simply pick up a new one.
One of these replacements was known as Commander Karbin, a Mon Calamari soldier who had been cybernetically fitted with a droid body, just like General Grievous.
Fuelled by envy of Darth Vader, Karbin would eventually challenge the Lord of the Sith, putting former Jedi Master Skywalker through a heated lightsaber duel that would challenge Vader, pushing him to his limits...