10 Fantastic Four Villains MORE Powerful Than Galactus
5. Gah Lak Tus
The Ultimate universe was a rebooted Marvel series created for new readers. Although many of the characters were redesigned, no one had a more drastic alteration than Galactus.
In this reality, Gah Lak Tus is 100,000 miles long and is composed of trillions of city-sized drones. Before the hive-minded being reaches the planet is desires to consume, Gah Lak Tus unleashes a psychic wave to drive the inhabitants insane so they can't perform a counter-attack. It then unleashes a flesh-eating spore on the world so there's no one left to put up a fight by the time Gah Lak Tus reaches it.
In the Ultimate Vision saga, Vision explains to Sam Wilson that no civilisation has survived longer than a few minutes against the Uncreator of Worlds. One planet spent 200 years booby-trapping its solar system to stop Gah Lak Tus but still failed. Another world upgraded each inhabitant so they had the power to level a Sun and yet, it didn't even slow Gah Lak Tus down.
Luckily, the superheroes of Earth managed to defeat the cosmic horde by shooting it with a Big Bang. Although this attack only destroyed one-fifth of Gah Lak Tus' body, it was forced to retreat.