Having been banished from this dimension by Tiamat, Gozer the Traveler journeyed from world to world with his two servants, Zuul the Gatekeeper and Vinz Clortho the Keymaster. When a cult of Gozerians resurfaced in the early 20th century in New York City, they included statues of Gozer's servants as Terror Dogs in the plans for their rooftop temple, and those were the forms Zuul and Vinz Clortho took when they breached our dimension. Pursuing and possessing humans who lived near the temple, Zuul and Vinz Clortho returned to their Terror Dog forms once the portal to Gozer's dimension had been opened.
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