There were rumors that Mephisto was the force behind the events in WandaVision and its spinoff Agatha All Along finally dropped the demon's name.

For the past three years, we've had many wild theories as to when and where we'd see the demon lord Mephisto in the MCU.

In the comics, Mephisto is strongly connected to the mystical side of the Marvel universe, though he has had tousles with other characters. In Avengers West Coast #51, Wanda uses part of Mephisto’s soul to give birth to her sons Billy and Tommy, which is obviously something he doesn’t take too kindly to and eventually reabsorbs them.

Agatha All Along Episode 3 just name dropped Mephisto, one of the most dangerous villains in Marvel comics. But who is he?

Was that reference an inside joke or an overt wink to the arrival of a powerful Marvel villain? According to Jac Schaeffer, maybe it's both.

Agatha All Along showrunner Jac Schaeffer has finally revealed details about the show’s Mephisto connection after its third episode aired on5. Mephisto, regarded as one of the most powerful villains in Marvel,

The following contains spoilers for Agatha All Along, Episode 3, "Through Many Miles of Tricks and Trials." The Marvel Comics demon Mephisto could soon be making an appearance in Agatha All Along. The likelihood of the character's involvement in the story increased after he was mentioned in Episode 3,