Thunder

A Silver Age creation born from the legendary partnership of Stan Lee and Jack Kirby, Thunder first rode onto the scene in Two Gun Kid #60 back in 1962 — a Marvel character with roots in the wild frontier of the company's early storytelling ambitions. Over a remarkable span stretching all the way to 2022, this character has proven surprisingly durable for a figure with a relatively modest footprint, turning up across titles like The Avengers and Avengers: The Serpent Crown and earning a coveted spot among Earth's Mightiest Heroes as a genuine Avengers affiliate. With a key issue to their name and a roster of co-stars that includes the likes of the Two-Gun Kid, Rawhide Kid, and Nathaniel Richards, Thunder occupies a fascinating crossroads between Marvel's Western heritage and its superhero universe — exactly the kind of deep-cut discovery that reminds devoted collectors why digging through the back issues is always worth it.