Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.

Iron Man isn't afraid to be the underdog, boasting some of the strongest enemies in Marvel continuity - and they're always upgrading their tech.

Capable of manipulating weather, summoning thunder, and delivering devastating strikes, Mjolnir is almost as legendary as Iron Man's suit. Normally, it would seem impossible for Stark's tech to ...