Ursa Major

A Soviet super-soldier and member of the Russian team the Supreme Soviets, Ursa Major possesses the mutant ability to transform into a massive brown bear. He debuted as an adversary of the Hulk during a mission in the USSR.

Debuting in Captain America #355 in 1989 — a creation of the legendary Mark Gruenwald alongside artists Rich Buckler and Al Milgrom — Ursa Major is a Marvel Copper Age original who has quietly built a surprisingly durable presence across more than three decades of storytelling. With 33 catalog appearances stretching all the way to 2026, this character has woven through some of Marvel's most prestigious titles, sharing pages with heavy-hitters like Tony Stark, Wolverine, and Iron Man across runs of Avengers, She-Hulk, and Daredevil. There's even a key collector issue in the mix, a badge of honor that signals at least one genuinely significant moment in the character's history. For fans who love digging into the corners of the Marvel Universe where Cold War-era flavor meets modern superhero storytelling, Ursa Major is exactly the kind of find that rewards a deeper look.