The Alicorn Disease

Twilight is now the princess of friendship. Not only that, but she is also the new ruler of Equestria, but being a princess and an alicorn also comes with a price.

That price is immortal, just like Celestia, Luna, Candace, and Flurry, which means she will have to watch all of her friends pass away.

Twilight does not want to go through that pain, so she decides to pay a visit to The Canterlot Archives, where she finds the spell Celestia used to turn her into an alicorn.

She decides to use the spell on her friends so that they can be like her. At first, she thinks it works, but then the spell begins to have terrible side effects.