For many a millennia he has slumbered beneath the earth, his strength recovering from a conflict as old as the sands it was fought upon. For many a millennia he and his people withered away into legends, spoken of by the elderly to their young as nothing more than stories before bed. For many a millennia the world itself forgot about this being, hidden away within a cage of dirt and rock and time.

But now he has awoken to find himself lost in a world nearly unrecognisable, dominated by a species he'd not laid eyes upon for many, many years indeed.

Yet there still lived a select few who knew him personally. To them, he was an old yet dear friend, long believed to have been lost to the cataclysm that cost him his people and his kingdom. Despite all the time that had elapsed and despite all that had happened throughout the years, they still knew his name.

Cyrus Perennem, 'The King Without a Crown'.

Christopher Razka is the CEO and Chairman of CHECKMATE Arms, the largest weapons manufacturer in the world. However, things have not been going well for the company or Razka lately. After a long week spent at board meetings and managing his company, Razka finally has time to enjoy the weekend. Or so he thought. He gets woken up early in the morning by a strange pony in his bedroom that has the ability to speak and claims to be some sort of princess. If only Razka was dreaming this.

This idea just sort of hit me one day and I decided why not make it into a story.
I'd like to thank Maiah for the amazing cover art!
I'd also like to thank TimeSwirl for proofreading and BLACK M3SA for editing this story!

Corporal Mason Gray and his partner, Staff Sergeant Matt Barker, are abandoned in the Ukrainian wilderness after failing a mission to assassinate a terrorist cell leader. Giving up, he accepts help from a mysterious spectre, feeling himself being transported somewhere else.
Once in Equestria, he discovers a plague, emanating from a dark pit in the earth, that threatens to eradicate pony-kind, just as it did to the dominant race before even Discord, and it needs to be stopped at the source.