WARNING: The following contains spoilers for the second episode of Marvel's WandaVision, now streaming on Disney+.

The first two episodes of WandaVision introduced audiences to the town of Westview, its residents and the happily married couple, Wanda and Vision. At first, everything seemed idyllic, but Episode 1 quickly clarifies things were not as they seemed. Any feelings of dread, however, were quickly shrugged off by the characters and Episode 2 opened with Wanda and Vision working on a magic act for the town's talent show.

During a meeting for the talent show, the conversation amongst the ladies offers up a potential Easter egg that may give viewers a clue as to who the actual villain of the series is. A seemingly throwaway line about "the devil" could mean big trouble for Wanda and Vision. Dottie remarks to the ladies in attendance that "the devil's in the details." Agnes leans over to Wanda and replies "that's not the only place he is."

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The devil mentioned here could be none other than Mephisto, one of Marvel's most terrifying and powerful villains to date. Mephisto is an extra-dimensional demon and ruler of Hell. He typically resembles the devil, although he can take the form of almost any being or animal in order to achieve his nefarious goals. Among his powers is the ability to mix one reality with another.

Mephisto's influence on the inhabitants of Westview could explain the distorted reality heavily featured in each WandaVision trailer along with what has been seen in the series so far. However, it is his connection to Wanda and Vision's children in the comics that may be the most important clue that he is, in fact, the evil presence lurking just off-camera.

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In the comics, Scarlet Witch uses her magic to conceive children with Vision. When she creates the twins, Thomas and William, she unknowingly did so with two fragments of Mephisto’s scattered soul. Once he realized what happened, Mephisto reabsorbed those fragments, effectively killing the children. This loss is what drives Scarlet Witch insane and sets off the events of House of M, in which she attempts to alter reality to recreate her lost children.

Marvel Mephisto Evil Flames

After dealing with the devastation of losing her brother Pietro in Avengers: Age of Ultron then Vision in Avengers: Infinity War, it is safe to assume that dealing with a third monumental loss would in fact set Wanda down a path of madness. This is especially true if Vision is actually dead in the series, which was hinted at by Agnes in the first trailer.

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Although Marvel has yet to confirm a villain for WandaVision and while it could still end up being Wanda herself, Mephisto is a key component in the story of her children and her descent into madness. Wanda's use of chaos magic as a result of encountering Mephisto in WandaVision could very well set up Doctor Strange in the Multiverse of Madness and the rumored multiverse pandemonium happening in Spider-Man 3. If that is the case, this devil is very much in the details of Phase 4.

Written by Jac Schaeffer and directed by Matt Shakman, WandaVision stars Elizabeth Olsen as Wanda Maximoff/Scarlet Witch, Paul Bettany as Vision, Randall Park as Agent Jimmy Woo, Kat Dennings as Darcy Lewis, Teyonah Parris as Monica Rambeau and Kathryn Hahn as Agnes. New episodes air Fridays on Disney+.

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