[quote=@Stern Algorithm] So your hero would, like Superman, be solar-powered? I think that would be fine. What other powers would this lineage give? For some more galactic backstory, each arm of the Milky Way Galaxy has been assigned a caretaker species by the Canon. The Jarav have been caretakers of the Sagitarrius arm for a few thousands of years, their creators were the caretakers before that. Does your alien only inhabit the stars of non-canonized species in order to avoid detection, and move on once the Jarav presence becomes more focused? And for some reason, instead of fleeing to another star, this particular one chose to remain on Earth. Would it have possessed a human, living as a symbiote, and transferring itself to its child/children if/when the parent died, or did it manifest a human body and live life as a human, mating and giving its powers to its child/children? Since it's only been 30 years since the Jarav made themselves known, and thus become fully invested in Earth, your alien lineage might only be two generations long (alien parent and half-alien child). I can think of potential reactions the Canon might have should they ever discover that a parasitic, solar energy devouring species was ever discovered. If the amount of energy drained is insignificant with respect to the total energy output (AKA lifespan) of the star, the Canon may choose to classify it as a non-threat. If it is significant, well, we might have another galactic purge on our hands. For the greater good, and all that. [/quote] I thought a lot harder about this, and my idea is about as follows. The Star Vampire has inhabited Sol for a few million years, really no time at all to a being nearly as old as the universe, and eventually comes to notice the Jaravs' presence in the system. Star Vampires consider the Canon to be a threat, having seen their various galactic purges throughout the years. Individually they are extremely powerful, but they are few in number and scattered throughout the galaxy, and would be relatively easy to exterminate. The untimely death of Sol would undoubtedly be investigated by the Canon, thus endangering the revelation of their existence. Having only "just" traveled to Sol from the most recent star that it sucked dry, and as such had insufficient strength to flee the system to Alpha Centauri. It concocts the plan to flee to Earth, embed itself in a human genome, and wait for humanity to reach such a point that it can be "smuggled" out of the system by interstellar travel. Much like you said, the Star Vampire acts as a symbiote, passing from one human generation to the next. Its power is so great, that to keep from killing its host, the Star Vampire had to disperse itself through its host's system down to the genetic level, which is what grants the powers. The primary ability that I imagine the wielder possessing is "activating" the latent Star Vampire DNA, and transforming into a part-human, part-energy form, from which the powers are derived. As the host has access to more energy, more advanced forms can be used as more of the dormant DNA can be activated. The powers are simple stuff, mostly; super strength, flight, armor, energy blades and blasts, etc. I have the idea to "flavor" the powers and transformations by what sort of energy was used for it. Photons would be the most common, for energy derived from the sun, but I have other ideas for Tachyons and Dark Matter. How's it sounding so far?