Chronexus 3000

The Chronexus 3000 was, according to Majenta Pryce, the ‘ultimate time travel device'. She used it to help operate the Hotel Historia on Earth. The Graxnix wanted it, as it was superior to their time travel technology. But when they used it to return to the 41st century, its failsafe made them be outside of history so they could not cause any paradoxes. (COMIC: Hotel Historia)