A creature of old has been present in Equestria since the beginning of the rule of the alicorns, watching, waiting. He saw their fall and the sisters' rise to power. Now, for the first time in eons, he steps from watching and takes action.

I got dragged to Equestria by pure accident due to an experiment gone 'wrong', roughly forty years before Nightmare Moons' arrival.
No matter what I do, as a pony-changeling hybrid, something will change with Equestria. I just hope I don't doom the country before Nightmare Moon even arrives... Or worse.

This is the first story I ever tried to write professionally, so there WILL be errors, for that, I apologize in advance.
I'm editing and proofreading it on my own because I literally suck when it comes to using this site competently.
Lastly, I am a slow writer due to IRL getting in the way but I will try my hardest to settle the story down whether it's popular or not.

Fair warning, there may be spoilers in the comments.

Thank you to Little Tigress for the fantastic cover art.

To escape from Tartarus is nearly impossible, even for one of great magical power. When you've lost your powers and are little more than a withered old centaur, it's even harder. But Tirek has a plan, one that will draw in a creature from a world where life is cheap, hats are plentiful, and gravel is king. Will the Spy take the opportunity to enjoy a well-earned vacation in this new world, or will he see the population of friendly, innocent ponies as just a fresh selection of backs to stab? It could be both!

(Takes place before the beginning of Season 9.)