A Light Beyond the Stars: it is destroying all life and must be stopped before it begins

Imagine causing the very thing you were sent to prevent

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They were the farthest out along the rolling way, and so they knew that they would be the ones to go and come again to prevent the all-ending. To protect their blessed biome, lost to the future but safe still in the past.

Of course, they understood the loop trap that they could not roll around, but then it was only theoretical within the fixed nature of the universal all-brane.

And so dutifully, they took the calm-space through the hor...