Starro

An immense alien starfish of unknown cosmic origin, Mother Star arrived in Earth's waters with a singular drive to conquer — draining a planet's magnetic energy and ocean life while spawning countless parasite clones to enslave surface-dwelling populations, drawing the world's greatest heroes together to stop it.

Few villains can claim they helped launch an entire era of superhero team-ups, but Starro can — this alien conqueror made its chilling debut in The Brave and the Bold #28 in 1960, the very issue that introduced the Justice League to the world, sharing those historic pages with Green Lantern, The Flash, Wonder Woman, and Batman himself. Created by the legendary Gardner Fox and Mike Sekowsky at the dawn of the Silver Age, Starro is one of DC's most visually arresting threats, a cosmic menace whose first appearance stands as one of the most collector-significant key issues in the entire DC canon. Over an astonishing span stretching from 1960 into the 2020s, this creature has continued to haunt the DC Universe across titles like Detective Comics and DC Universe: Legacies, proving that some horrors from the Silver Age never truly go away. If you want a character whose very existence is woven into the founding mythology of DC's superhero age, Starro is absolutely worth your attention.