It was impossible; she had been bested, again! It wasn’t even by her sister a fellow goddess this time either! No it had been by a group of mortal foals lead by some upstart unicorn filly! Well just because she had been beaten didn’t mean she would go quietly. As the wretched light drew closers Nightmare Moon split a fraction of her off and flung the fragment at the lavender unicorn then she awaited the final blow to fall.
As the rainbow of harmony unleashed the full force of its power upon the corrupted moon princess unnoticed by all a small sliver of dark energy struck Twilight Sparkle in her chest quickly absorbing into the young mare. This instant in time would go on to have a lasting impact upon not just Twilight Sparkle but the entity known as Nightmare Moon tying their fates together in a way that even the Nightmare hadn’t expected.
Some hours later after Princess Celestia had assigned Twilight her new task of studying the magic of friendship Twilight had returned to her new library home setting herself and her assistant Spike to the task of cataloging and resheleving the library in hopes of making it easier for her or anypony else to find what they needed should the need arise. Unknown to Twilight she wasn’t as alone in her thoughts as she had assumed she was.
Well this has turned out far better than I could ever have hoped for. Not only have I once more cheated death, I have also found myself a new vessel worthy of the privilege of hosting me. Barer of the element of magic and prized pupil of Celestia, Oh yes this will do nicely with some careful manipulation I’ll sawy this unicorn to my side and soon all shall be enshrouded in the glorious darkness of my beautifull eturnal night. Nightmare Moon purred to herself after she awoke she began to delve into the memories of her new host.
While she may be too weak to do much else at the moment that didn’t mean that she could afford to be idle. If she was to bend this Twilight Sparkle to her will she would need to know how the mare thought, her hopes, dreams, strengths, weaknesses everything about her. It is often said that knowledge is power and nowhere is that more true than in the realm of the mind itself. The more that Nightmare learned about her new host the stronger she would become, after a while she would be able to assert herself more in small ways like interfearing with the mare’s dreams and after a while even directly communicating with her. Once she could talk with twilight then she could begin her true task that of swaying the young unicorn’s loyalty to herself away from the princess of the sun, perhaps even convincing the filly to let her take control of the body, or even better constructing her a new body to live in after all it would be a waste of resources to simply discard such a keen intellect merely so she could be in the driver’s seat. Not to mention the blow it would strike against Celestia to see that her “Most faithful Student” had been turned against her devastation seemed to be a fitting turn for the impact that would have, not just upon Celestia but her friends as well.
Oh yes, you will be mine Twilight Sparkle you can bet on that. It is only a matter of time before you will fall; soon you will hang off my every word heed my every command and renounce your mentor to her face. In time you will grow to wonder why you ever followed her teachings in the first place. I will be your world all that will matter to you will be the simple act of pleasing me and that will be all you will ever need’ Nightmare vowed to herself as she resumed her work of examining in detail the memories of her newest host.
Twilight remained unaware of all of this for two reasons. The first being that she had yet to delve into the vast and complex field of study known as mental magic; the second reason was that while the fragment of Nightmare Moon had the memories and ambitions of her larger self she was far too weak to the moment to be detected even by the best telepaths. While this left her unable to influence her host it also granted her the boon of free movement for the time being allowing her to work without fear thus giving her the lead that she would need to begin her plans.