Long ago, the Gods had a twisted sense of humor, they thought it would be fun to see how Alicorns worked, so they imprisoned them, thousands died, the ones that survived the event have not been seen or heard from in generations. One of these Alicorns had a mishap when she was experimented on, and her horn got removed altogether from her existence. Naturally, she wanted revenge, and she got it, but not as an Alicorn, as a Pegasus.