Discord and Chrysalis attack Equestria and after the magic of friendship and the magic of the goddess of sun herself fall,Twilight decides to search the library for a spell that might be able to bann the evil beings. She finds a spell with no discription just an odd Image of a claw small-and index finger stretched out. Once returned to the battlefield she uses the spell and turns into a god of metal. With this new power she is able to defeat the villains and destroy ponyville during the process.