Sonar

A villain who made his mark in the mid-1990s DC Universe, Sonar debuted in Green Lantern #79 (1996), brought to life by the celebrated creative team of Ron Marz and Darryl Banks during one of the most dynamic runs in that title's history. With appearances alongside heavyweights like Kyle Rayner, John Stewart, and even Superman, this character clearly moved in rarefied company. Though his catalog footprint is compact, showing up across Green Lantern, Green Lantern Secret Files, and the Justice League Wedding Special, that spread across more than a decade speaks to a villain with staying power in the corners of the DC cosmos worth revisiting.