This is a prequel to Flame of Disparity

As her homeland of Canterim began to fall to the plague of the spreading Abyss, Rainbow Dash, having no Flame of her own, had learnt about the tales of the legendary Sunlight Maggot, said to be able to give Light to those who could find and control it, Light that could be the only salvation for her land. With a desperate need of Light, Rainbow leaves for the ancient land of Veorea, where Flame and Abyss originated, where disparity began.

This tale takes place before Sunset Shimmer's arrival to Veorea in Flame of Disparity, and how she came to this land from her own.

For those that may be new to this story or Flame of Disparity, this Rainbow Dash is an alternate universe one, whom Sunset meets in the dream world of Flame of Disparity.

A Dark Souls/Bloodborne Crossover.