Kronos

Kronos is an ancient cosmic Eternal of Titan who, after a catastrophic laboratory accident destroyed his physical body, transcended into a being of pure energy governing time itself. He is the grandfather of Thanos and the creator of Drax the Destroyer.

Emerging from the cosmic reaches of Marvel's Bronze Age in 1981, Kronos is one of those rare figures who haunts the grandest corners of the universe — a presence measured not in street-level adventures but in the company of titans like Thanos, Thor, Drax the Destroyer, and the Eternals of Titan. Introduced by Doug Moench, Keith Pollard, and Dan Green in Thor #314, this cosmic entity has persisted across four decades, surfacing in landmark series like The Infinity Gauntlet, Thanos Rising, and Quasar — precisely the kind of universe-shaking stories where a character of Kronos's scale belongs. Nineteen appearances may sound modest, but when your name keeps turning up alongside the most consequential events in Marvel cosmology, every page counts.