Diabetes is a terrible thing, and everypony has their own way of dealing with loss..

When the Winchesters have nowhere else to go, Dean asks for Castiels help

When spike failed to save the crystal empire the king of darkness known as sombra took over that was the day darkness fell.

after a attack by a archangel the winchesters and castel end up in equestria

After finding a mysterious book Twilight and Cadence are sucked into the book, only to find out that it's a completely different world in need of help.

An unnatural storm threatens to destroy multiple realities. Sam, Dean, and Cas see ponies