Eons ago, fiends fought over six crests that were forgotten by time, and ponies took over since then. The Tree of Harmony has been destroyed, and the Elements the branches held were nowhere to be found. None could pin a culprit to this heinous crime. When Twilight receives a half-blank book that's illegible, she gets attacked by a creature seen not by her eyes before.

Would the book, illegible as it is, as well as the first battle that would serve to thrust her into more battles to come and unanswered questions, have something to do with the missing Elements of Harmony?
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Crossover with Demon's Crest, wherein crossover elements will play out much more heavily in later chapters, as will the dark element. Tags will change as needed. More vivid battle scenes, but not too vivid, will show up later on in later chapters as well. Coverart done entirely by me. Updates will be irregular.