So I have good news and bad news.
The good news is that Gene Roddenberry was right. The universe is chock-full extraterrestrial civilizations, a fraction of which have faster-than-light travel; an even smaller fraction of which have carved out sizable interstellar empires. In our own galaxy there’s a statistical likelikehood of 3 million worlds with sapient species, and 100 times that many worlds that could support such life but are currently without it; the other galaxies in the local group are proportionately blessed. Many of the galaxy’s sentient species are more-or-less visually and psychologically similar to humans – think Vulcans, Kree, Nabooans, etc. Nobody has a map to all these worlds, by the way.
The bad news is that Stan Lee was also right. There’s a entity out there – let’s call her Sutcalag – who derives her sustenance from the mystical life-energy of the aforementioned worlds, a process that destroys all life on the planet in question. Sutcalag is unimaginably powerful–none of the interstellar empires have any weapon, ship, or fleet capable of harming her–and optimally feeds about at least a year, though she’s gone longer. She’s just appeared in Earth orbit, announced her intentions to chow down on Earth in 48 hours, and advised us all to make peace with whatever we worship. Naturally the US and every other technologically advanced nation tries to stop Sutcalag; all efforts fail.
With twelve hours to go, you, personally, get a message from Sutcalag. She has been scanning Earth’s inhabitants, and it turns out that you possess the rare genetic quirk that will permit you to be given a fraction of the Power Cosmic that is her birthright; you’re the only person on Earth of whom this is true. If you agree, Sutcalag will give you a fraction of her power and make you her herald, with the ability to survive in outer space, fly far faster than light, and so forth–the whole Silver Surfer package. You’ll be charged with scouring the universe for planets she can consume. You will have to serve for 1000 years. Earth will be spared during your time of service, and if you complete it that term faithfully, it will be spared in perpetuity. At least once a year you will have to provide Sutcalag with a planet to consume. Fail, and she’ll return to Earth and consume it, then track you down and kill you. If any of the interstellar empires moves against Earth in vengeance for your complicity in Sutcalag’s genocide, you will be granted leave from your duties to defend your homeworld.
Over the last million years, Sutcalag has had about 1000 heralds, about two-thirds of whom remained faithful through their terms, the rest of whom eventually betrayed her to their sorrow and their world’s destruction. Several of them had to defend their home world’s against vengeful alien fleets. In every single case, the heralds won.
Do you agree to become Sutcalag’s herald?