During the peaceful and prosperous development of Equestria, a mysterious cosmic energy fluctuation caught Twilight's attention. This energy seems to come from the distant starry sky, full of unknown mysterious power. Through magical research and consulting ancient occult books, Twilight discovered that this might be related to an ancient prophecy. The prophecy mentioned that there are mysterious items or powers hidden in the vast sea and starry sky that can affect the fate of the entire Equestria, but they are also accompanied by huge dangers.
The story begins when the ponies accidentally enter the Vast Sea Galaxy...
