(Gravity Falls crossover) Discord and Bill Cipher where once partners in chaos. Traversing across dimensions, having fun while leaving a trail of absolute disorder and mayhem in their wake. Over 1000 years have passed, Bill has noticed a change in Discord, and is curious to know what has happened since then. He also never forgot about that old bet they had once made. Perhaps he can use the source of Discord's change to his advantage? But Discord knows Bill far too well, and he won't let him have his way...

A stranger has arrived from another world. He plans to cause ultimate destruction and chaos not only across Equestria, but other worlds as well. The Mane 6 work together to stop him along with some help from a new ally. Like the stranger, their new ally is also from another world, and not only does he know the stranger quite well, he looks just like him...let's get dangerous!