This story is a sequel to House that Heartbreak Rebuilt

Heartbreak, after a roller-coaster ride of an adventure, is finally in a home of her own, and an honorary Cutie Mark Crusader to boot! Unfortunately, her time with the Crusaders and the Summer Readers Club is more than just social calls - it's also a one-of-a-kind opportunity for Equestrian germs.

It's Fluttershy's turn to teach Heartbreak a lesson in friendship, but it will be a struggle to get a real understanding of kindness through to the sickest, most stubborn tan mare in Equestria.

After a freak accident, Princess Celestia finds herself in a whole new universe. As she seeks a way home, she is captured by none other than Team Rocket.

Welp.

Now on TV Tropes.

When a rampaging roc, deadly dragon, or horrifying hellhound threatens the idyllic snowy vistas of Equestria, it's the mission of the Celestial Slayers to protect the ponies, and hunt the bloodthirsty beasts that would harm them.

Rarity is one such Slayer.
A woman who has devoted everything to saving the lives of ponies, and ending the lives of monsters. For Rarity, there is no life outside the Hunt.

Except for her time spent at the Golden Oaks Library, flirting with the cute librarian.

A slow-burn, Raritwi-flavored Omniship adventure.
Inspired by Earthsong9405's Slayer!AU where Rarity hunts monsters and Twilight's a peaceful librarian.