MLP: Tales of Altazor - Old description (for reference)

"Something strange is happening in Equestria, as shape-shifting pony Starlight Dawn arrives at Ponyville to warn the Mane Six about an impending catastrophe which may change the entire universe as we know it. As Starlight Dawn and her friends join one of the biggest adventures in their lives, they arrive at the magical land of Altazor in search of the missing piece that may not only restore peace to the universe... but also unlock a secret hidden for ages."