The Alicorn Ritual

No one could understand what had happened to poor Twilight, but Celestia had a theory on where to find a solution to the problem. Neighsay volunteered to assist with the search.

Two hours later, at "The Castle of The Two Sisters":

They searched the library for a while, until Neighsay found a well-worn leather book.

"Your Highness, would this be of any help?", he asked Celestia.

"Equestria's Ancient Ceremonies, and Rituals", said Rainbow Dash, reading the title after blowing off the dust.

Rarity turned to a marked page, labeled "Alicorn Appendage Restoration Ritual". There was a story explaining the purpose of the ritual, and when it was last used.

Celestia began having a flashback, because she remembered the use of that ritual.

"I can remember the time that was last used.", she said. "It was when I was still a filly. Luna was two years old."