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A civilization that commands the energy output of an entire galaxy, roughly 10^37 watts, by harnessing the power of billions of stars. Such a civilization would have colonized or engineered most star systems, built a galaxy-spanning network, and could perform feats like re-routing star clusters, extinguishing supernovae, or even regulating the rate of star formation. They are essentially immortal and omnipresent within their galactic home.
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