Sombra's Attack on Twilight

Three months ago...

The Christian Fleet had helped Equestria take down past villains, including Emperor Grogar. King Sombra's horn had been sealed in a crystal and shot into a black hole in space. Little does anyone know that the black hole has exploded and the crystal has landed on Equus. Sombra may be able to return and wreak havoc across the globe. Does he have a target? If so, who is it and what are his plans?