sufficient for TSR, Inc. to place it and Strahd von Zarovich at the heart of a new product series released in 1990, Ravenloft: Realm of Terror — an entire campaign setting based on the Gothic horror theme of Ravenloft. After being featured in the Ravenloft setting, Strahd became one of the most popular villains appearing in Dungeons & Dragons. Game designer Rick Swan commented on Strahd: "A high-level necromancer of incomparable cunning, Strahd holds his own with Count Dracula as one of horror's most memorable bloodsuckers." The designers of Ravenloft: Realm of Terror decided to focus on campaign atmosphere which resulted in the Ravenloft setting becoming the "demiplane of dread". This demiplane now "included many horrific lands, including the lands of Barovia and Mordent from the two 'Ravenloft' modules. Strahd's backstory from the original 'Ravenloft' was even incorporated into the story of how Ravenloft, the demiplane of dread, came to be". In 1991, Strahd was a main character in two novels: Vampire of the Mists and Knight of the Black Rose. His official "autobiography" has been presented in two novels by P. N. Elrod: I, Strahd: Memoirs of a Vampire (1993) and I, Strahd, the War Against Azalin (1998). There are many similarities between the character of Strahd von Zarovich and that of fellow fictional vampire Barnabas Collins from the American 1960's-1970's soap opera Dark Shadows, as P.N. Elrod mentions on her personal Livejournal blog. Strahd appeared in multiple adventure modules set in the new campaign setting and received "special attention in the final adventures of the Grand Conjunction sequence — RQ3: "From the Shadows" (1992) and RM1: "Roots of Evil" (1993)". Roots of Evil added additional details to Strahd's background; such as, the introduction of the arcanaloth Inajira with whom Strahd "made a pact in far-gone times". The tenth Ravenloft adventure, RM4: House of Strahd (1993), was a revamp of the original Ravenloft module with the following changes: it was updated to the AD&D 2e ruleset, Barovia lore was brought in line with the lore of the campaign setting, and Strahd was given a power boost "to reflect his status as a Dark Lord". In 1994, Strahd returned in the second edition Ravenloft Campaign Setting boxed set which was a revision of the Ravenloft: Realm of Terror (1990) boxed set. Strahd was a main character in the DreamForge Intertainment video game Ravenloft: Strahd's Possession (1994). Strahd also appears in