It's a crossover story between My Little Pony and Hermitcraft (a Minecraft SMP YouTube series). The Story takes place during the current Hermitcraft season 10 at the end of the exiled Arc and after the events of Season 6 of MLP.
Short plot summary: an evil entity known as The Watcher allies with Chrysalis and Sombra through his interdimensional powers, planning to take over both Hermitcraft and Equestria. However, their plan goes south when Grian dormant Watcher powers and Twilight's Magic bring Twilight's friends and other ponies into the world of Hermitcraft. The Hermits now have some new friends on the server. Following several POVs, as the Hermits meet their new, colorful friends. Both sides “get” along and join together on a new adventure or new and fun creative projects together.
These new friendships and bonds strengthen both sides as they join together to face the villainous Trio to defend and save their worlds.
This story is formatted and inspired by the My Little Pony and Transformers crossover comics. Similar to the issues of the comic, the characters meet and interact in fun, creative, and unique ways, combining the magical possibilities of MLP with the endless creative possibilities of a Minecraft SMP.
Hermitcraft is a 15-year-old Minecraft SMP series featuring 24 different creators. It has a beloved and fun cast of creators. You can search for Hermitcraft on YouTube.