Based on the provided reference, "The Darkest Dream" is the beginning of an epic tale about a group of Hanataz youth working security for the last Carnivalle of the season. The Hanataz are described as the Traveling Folk in the world of Zyathé, ostracized due to Blood-Touched members within their groups.
Therefore, in this context, "The Darkest Dream" is a story title. It is not referring to a universal concept of the worst possible dream but rather the name of a specific narrative.
