Abilities: Tony Stark's so-called "powers" all came from his remarkable intellect. He built the first Iron Man suit while being held captive by a terrorist group in an Afghanistan cave. Over the following years, he constantly rebuilt and improved upon his Iron Man technology, eventually harnessing nanotech to create an extremely durable suit with powerful weapons.

Power scale: 9. Iron Man was the only Avenger who was able to injure Thanos in "Infinity War," and he did it when Thanos had already collected four Infinity Stones. He was also the only person Thanos knew by name, which served as evidence to Iron Man's fearsome reputation.

"Endgame" solidified and built upon that reputation. Iron Man was able to outsmart Thanos in the most important possible moment and briefly wield the power of all six Infinity Stones, which previously seemed like it should be impossible for a regular human body to withstand.