Twilight, in the midst of a hard study session, discovers a gap in Equestria's history. The Princesses refuse to explain, and with her friendship with Rainbow Dash straining, there's a lot to deal with.

Nearly 1100 years ago, a mysterious entity tears its way through the newly-founded Equestria, killing without a second thought and growing stronger.

This is the story of these events and them colliding as an ancient evil stirs from the depths of the world...

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I drew the cover image.