Roguebot

In the early sixties, NASA scientists detected a strange celestial body, that was slowly heading towards Earth, and the calculated a certain impact 60 years into their future. Based on intercepted radio transmissions from this asteroid-like body, they determined, that it was purposely guided. To avoid global panic, they decided to keep this find secret but to send an armed robot to intercept the body and exterminate the evil entities on board, smirkingly called the seven wizards.