She couldn't have made it herself. A solitary bookkeeper, long disillusioned with the "dream job" of maintaining the Canterlot archive, becomes the unwitting guide to a panicked Princess of the Night in the deepest recesses of their voluminous libraries.

Deep underneath the shelves and scroll racks, through the perilous and twisting caverns and gnarled trap-laden corridors, he realizes she isn't just seeking a getaway from the pedantic Canterlot politics. She's seeking to destroy an evil as old as the night sky itself. An evil that...well, she couldn't have made it herself...

Following his tumultuous defeat, King Sombra is flung across space and time to exit out a human's malfunctioning toaster. For weeks, Sombra monologues his revenge to destroy those that hurt him. But seven months later, when a route back to Equestria is found, does he not seem all that interested in returning.

Edited by spigo.

Prequel: The Roommate From Tartarus
Side Sequel: (Not My) Home Sweet Home

Update: labelled as complete. The last three chapters will remain as bonus chapters.