On the first day, ponies were given a soul and with it, clarity. On the second day, upon Equestria was planted an irrevocable poison. A soul devouring demon.

King Sombra the Proud, by channeling the souls, brought unprecedented prosperity to the kingdom of Crystal. That is, until the Colorless Fog came. The Crystal Empire was cut off from the outside world. Many ventured into the deep fog, but none returned. That is, until Clover of the royal Twin Horns broke through the fog to warn Equestria of the Crystal Empire's plight. That King Sombra had unwittingly aroused the Old One, the great chaos below the Nexus, from its eternal slumber; and that the Colorless Fog has brought about hordes of monstrous Demons.

The Demons hunted down ponies and feasted on their souls. Those who lost their souls, equally lost their minds. The mad feasted on the sane and chaos reigns. Clover spoke of the tempting power of the Demon souls. Each time a Demon devoured a pony's soul, it's own demonic soul and life force became stronger. But the power of a matured Demon soul was said to be beyond pony comprehension.

The legend spread around Equestria, many were drawn to the cursed land, yet none returned. Starswirl of the Twin Horns, Rainbow Dash the Silent Chief, Saint Cadence, Maud the Wanderer, the Maiden Fluttershy and her knight Big Macintosh, and Sage Twilight the Visionary.

The Colorless Fog soon spreed beyond the Crystal Empire's borders, ponykind faced a slow extinction. Soon, the Fog shall swallow all of Equestria. But the Crystal Empire, and all of Equestria may have one final hope. The brave souls of ponies unwilling to give up the fight. Has Equestria found their salvation, or have the Demon's found a new slave?