A mysterious location known as The Vault of Secrets is home to a very unique secret. Rumors about what this secret is has all circulated across the Multiverse. But there is only one truth to that secret, and that secret is something Lola has to reveal to her newest friends.

This is a story for crossover specials between various MLP AUs. Whenever something causes a crossover event, you'll know when a story suddenly gets interupted by something like "TO BE CONTINUED IN STARCROSSED" or something similar. When that happens, make sure to check here for the crossover special. This story is marked Mature, but that's only because it's to be absolutely safe. And as they say, better to be safe then sorry.

Crossover list:
Crossover #1 - The Vault of Secrets: When someone misuses the Vault of Secrets, it prompts Lola to show her new friends the mysterious Vault of Secrets.
Crossover #2 - Starcrossed: When the mysterious Overseer that appeared in My Little Pony: Dawn of Friendship - Fimfiction causes problems and breaks the seal containing a mysterious black being, it prompts a unicorn raised by earth ponies at Radical Junction to seek help before it's too late.
Crossover #3 - The Journey: Following the end of "MLP: DoF - The Goddess of Light", Cozy Glow begins searching for a new version of Equestra to reside in. These are various AUs of MLP that she visits along the way. (Features Cameos for the stories Another Side of Friendship: Pony Tails - Fimfiction, Sombra's Recovery - Fimfiction, and Umbraenstein: Umbra Castle - Fimfiction in that order as the first three AU visits.)
Crossover #4: One Last Score - In this final crossover event, the Changeling of Friendship crew deal with a power-mad human while also following the trail of a mysterious rabbit who has a bone to pick with said human. It's time for one last crossover, and one last score.