The new villain in Stranger Things season 4 could be even scarier than the Mind Flayer from seasons 2 and 3, and here’s why. In just three seasons, Stranger Things has built its own mythology, which has taken inspiration from various works from the 1980s as well as from the fantasy tabletop role-playing game Dungeons & Dragons, though there’s still a lot that the series has to explain, such as the true nature of the Upside Down. Stranger Things season 4 promises to address some of these questions, but it's also introducing plenty of new lore by way of its main villain.
Stranger Things season 1 focused on the disappearance of Will Byers (Noah Schnapp) and the experiments at Hawkins Lab. Stranger Things season 2 explored the aftermath of Will’s return and the consequences of his time in the Upside Down, and season 3 revealed that the Russians were trying to open gates to the other dimension, and had settled a secret laboratory underneath the new Starcourt Mall. Every season has had two different types of villains: humans (Dr. Brenner, those working at Hawkins Lab, the Russians) and monsters (the Demogorgon, Demodogs, and the Mind Flayer).
Related: Stranger Things: The Upside Down Is Future Earth Theory Explained
As Stranger Things season 4 plunges even deeper into the mysteries of Hawkins and the Upside Down, it will also up the stakes in terms of villains. The human bad guys may be familiar, as Hopper is still trapped with the Russians and Dr. Brenner appears to be making a return. When it comes to Stranger Things season 4's supernatural villain, however, the kids will be facing a brand-new D&D-inspired threat that may be the show's scariest yet.
The new Upside Down villain in Stranger Things season 4 is Vecna, another
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