On paper, the Mephisto reveal is an exciting one for MCU fans who have been begging for it since WandaVision. Even if his appearance in Ironheart isn't comic book-accurate like it would have been in a show like WandaVision, it's still fitting given the show's broader conflict between magic and technology.

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

Mephisto has officially made his MCU debut in the final episode of Ironheart. The long-speculated demonic villain is finally here, and he’s brought with him a chilling blend of charisma, chaos, and godlike power.