MLP - A Guardian's Hope

Pepper Chilly's stay in Ponyville and Canterlot brought her between Elements and Princesses alike. But when her dimension-traveling eye spotted the hourglass running out of sand, Princess Celestia paid the ultimate price. What the regicide didn't know was that her next murder would bring her back to Equestria, alongside Gamine, a guardian in training, just in time to witness the fallout and the unforeseen consequences of Celestia’s disappearance.