Beast

X-Men (1963) #1

First Appearance: X-Men (Cyclops, Marvel Girl, Beast, Iceman, Angel), Magneto

The first appearance of the X-Men and Magneto. Stan Lee and Jack Kirby introduced Professor Xavier's team of mutant students and their greatest nemesis in this landmark 1963 issue. One of the most valuable Silver Age keys — high-grade copies regularly sell for six figures.

Infinity Gauntlet (1991) #1

First Appearance: Infinity Gauntlet — Thanos erases half of all life

The opening issue of the Infinity Gauntlet — the story that became the blueprint for Avengers: Infinity War. Thanos snaps his fingers and eliminates half of all life in the universe. A landmark modern key that skyrocketed in value after the MCU films. Written by Jim Starlin with art by George Pérez.

X-Men (1991) #4

First Appearance: Omega Red — first appearance

The first appearance of Omega Red, the Soviet super-soldier with carbonadium tentacles and a death spore factor — one of Wolverine's most dangerous foes. A key Bronze Age issue from the height of the early 1990s X-Men boom. Written by Jim Lee and Scott Lobdell.

X-Factor (1986) #5

First Appearance: Apocalypse (En Sabah Nur) — cameo

First cameo appearance of Apocalypse, the immortal mutant conqueror who would become one of the X-Men's greatest enemies. A key Bronze Age issue marking the debut of one of Marvel's most powerful villains.

X-Factor (1986) #24

First Appearance: Apocalypse (En Sabah Nur) — full appearance

First full appearance of Apocalypse, following his cameo in X-Factor #5. Establishes the full threat of En Sabah Nur, one of the X-Men's most powerful and enduring villains. A key Bronze Age issue.