This story is a sequel to At the Summit of Apocrypha

Hermaeus Mora gave Princess Twilight Sparkle a choice, and Princess Twilight Sparkle made it.

Now she finds herself in a world filled with the souls of the dead, a purple sky, a creature of death, and a dragon with a cursed purpose. Among all this lies the fate that the Prince of Knowledge promised her, or so he said. Will Twilight find was she was looking for in the dreaded Soul Cairn, or will she be greeted with something else?