Thanos

Thanos Quest (1990) #1

First Appearance: Thanos Quest — major Thanos key

Thanos acquires the six Infinity Gems in this landmark two-issue limited series, setting the stage for the Infinity Gauntlet. Written by Jim Starlin. An essential read for understanding the Infinity Gauntlet storyline and one of the most important Thanos stories ever written. Demand has surged post-MCU.

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.

Iron Man (1968) #55

First Appearance: Thanos, Drax the Destroyer — first appearances

The first appearance of Thanos — the Mad Titan and the greatest villain in the Marvel Universe — along with Drax the Destroyer. Written by Jim Starlin, this Bronze Age key has become one of the most sought-after first appearances in all of comics following the MCU Avengers: Infinity War and Endgame films. Near-mint copies have sold for over \$100,000.