Here's how the Fantastic Four could theoretically defeat a Mummy King:
* Stretchy Tactics: Mr. Fantastic's ability to stretch and contort his body could be used to disarm the Mummy King or trap him in a tight bind. He could even use his elasticity to create a makeshift tomb or a large net to contain the villain.
* Flame On!: The Human Torch's flames could be used to weaken or destroy the Mummy King's wrappings. He could also incinerate any ancient artifacts the villain might be using as weapons.
* Rock Solid: The Thing's super-strength and durability would allow him to withstand any physical blows from the Mummy King. He could also use his rock-like body to crush the Mummy King or use his massive fists to smash through any ancient traps the villain might set.
* Invisible Advantage: The Invisible Woman can turn invisible and use her force fields to shield the team from attacks. She could also use her invisibility to sneak up on the Mummy King and deliver a surprise attack.
Additionally, the Fantastic Four could utilize their combined intelligence:
* Scientific Solutions: Reed Richards could use his scientific expertise to analyze the Mummy King's weaknesses or develop a weapon that could counteract his powers.
* Ancient Lore: Sue Storm might be able to use her knowledge of ancient Egypt to understand the Mummy King's motivations and find a way to defeat him.
Ultimately, the key to defeating the Mummy King would be to exploit his weaknesses and utilize the unique abilities of the Fantastic Four. They would need to work together strategically to overcome his strength and ancient magic.