It was released on October 20, 2020. This module is the first released with the publisher's new focus on diversity and inclusion. Wizards of the Coast stated that "the adventure includes the latest errata and a revised depiction of the Vistani" who are based on stereotypes about the Romani people. In February 2021, Wizards of the Coast announced a new Ravenloft campaign sourcebook, Van Richten's Guide to Ravenloft (2021), which introduces other Domains of Dread to the edition. It was published on May 18, 2021. Fictional setting Ravenloft is primarily a Gothic horror setting. Dungeon Masters are encouraged to use scenes that build apprehension and fear, culminating in the eventual face-to-face meeting with the nameless evil. Characters have a much greater significance attached to their acts, especially if they are morally impure, as they risk coming under the influence of the Dark Powers (through the game process called "dark powers checks") and gradually transforming themselves into figures of evil. The magical mists of Ravenloft could appear anywhere in the Dungeons & Dragons universe, drawing evil-doers (or player characters) into the Ravenloft setting. One exception is the phlogiston of the Spelljammer setting. The phlogiston blocks all planar travel, but the Ravenloft mists can appear in deep space inside crystal shells, according to the Complete Spacefarer's Handbook. Luis Javier Flores Arvizu named the continuous presence of supernatural beings as one of the factors that made Ravenloft a very well received role-playing game setting during the 33 years of its existence. The Dark Powers The Dark Powers are a malevolent force who control the Demiplane of Dread. Their exact nature and number are deliberately kept vague, allowing for plot development in accordance with the Gothic tradition of storytelling – where the heroes are frequently outclassed and outnumbered by unknowable evil forces beyond their control. The Dark Powers most frequently serve as a plot device for Ravenloft, especially concerning the Darklords, the visible rulers of the Ravenloft Demiplane. Where the player characters are often tormented and opposed by the Darklords, the Darklords are themselves tormented and opposed by the Dark Powers. Of course, the difference lies in order of power—while many D&D adventures focus on allowing a band of heroes to prevail over a Darklord (much as in the spirit of Bram Stoker's novel Dracula), no such victory over the Dark Powers seems possible, or even conceivable, for the Darklords. Vecna and Lord Soth