
The Pony Who Would Be King {Supernatural x MLP}
Castiel recalls how Heaven became a battlefield, and how his brother became his enemy. Meanwhile, his friends suspect he’s working with a dangerous foe.
Heaven is at war. Celestia is no longer there to maintain control and balance, and the angels are in a panic. They’re desperate for someone to follow.
Castiel wants them to understand freedom. He broke away from Heaven, deemed as a traitor, and learned the meaning of freedom. Of friendship. But his brother, Raphael, wants something else for the angel ponies.
Determined to prevent the return of the apocalypse, Castiel takes a risk and turns to a dangerous enemy for help. It may be the only way to stop his brother, to save the world and his friends.
But it’s only a matter of time before Sam and Dean find out, and Castiel’s choices put their friendship at stake.


5638 words: Estimated 28 minutes to read
6 Chapters:
- Prologue 2025-02-16 17:49:42 UTC474
- Friends and Foes 2025-02-16 17:49:48 UTC1675
- Straining Friendship 2025-02-16 18:00:42 UTC959
- Hiding and Lying 2025-02-16 19:45:03 UTC447
- Heaven’s Fall 2025-02-16 22:46:46 UTC1037
- “Cass Is Our Friend” 2025-02-19 21:48:15 UTC1046