Cracks in the Mask
There is a safe in Celestia's chambers. Made of a dark, unidentifiable metal, it cannot be noticed by normal eyes. That is thanks to the enchantments placed upon it. Nestled underneath a rather tasteless purple and golden dress, the safe stands resolutely, protecting its contents.
The safe has a door and a handle, but no dial or numerical lock. It can only be opened with a drop of blood from its owner. Blood magic, the most sacred and dangerous of all enchantments protects this safe from magic and would curse any being who would dare attempt to break the safe open. And if blood magic wasn't enough, the dark metal would protect the safe from physical destruction and make sure that the safe would be too heavy to be moved.
Of course, one probably would ask: What could warrant this level of security?
If one is able to open the door, they would be initially quite disappointed at the find. Inside the safe are five divided levels. Each partition is packed with scrolls, diaries, journals, papers, all neatly stacked and filed away.
If any thief ever bothered to read the papers though, they'd uncover a secret. A rather surprising secret. A very dangerous secret. A secret that would explain a lot of things and yet would force one to question everything they knew about... well Equestria.
You see, if Celestia tried to open the safe, she would fail. She'd probably escape the magical curse unscathed, but she'd fail to open this safe regardless.
Why? Because Celestia doesn't own this safe.
Alternia, the changeling queen, appointed impersonator of Princess Celestia does.
And these scrolls, speak of her life behind her mask.