Mephisto debuts in Ironheart, sparking fan theories. His powers include reality bending and control over life. He grants Hood abilities and demonstrates immense strength. Some speculate he is stronger than Thanos.

Fans have been wondering if/when/how the devilish character would ever arrive onscreen since the premiere of WandaVision four and a half years ago, and Ironheart creator Chinaka Hodge tells Entertainment Weekly that the decision to include that long-awaited moment in this series was not hers "alone."

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.