Onomatopoeia

Onomatopoeia is a mysterious, near-silent serial killer who targets non-powered superheroes, communicating only by voicing the sounds around him — footsteps, gunshots, heartbeats. His true identity and motives remain unknown, making him one of DC's most unsettling modern villains.

Few villains in the Modern Age arrived with as much unsettling creative flair as Onomatopoeia, unleashed on DC readers in Green Arrow #12 in 2002 by the wickedly imaginative team of Kevin Smith and Phil Hester. This enigmatic antagonist has haunted the pages of Green Arrow, Detective Comics, and even Future State: Catwoman over a nearly two-decade run, crossing paths with heavy hitters like Green Arrow, Black Canary, and Robin along the way. Rare in appearance count but outsized in impact, Onomatopoeia is exactly the kind of cult-favorite DC villain that rewards deep-cut collectors who love their rogues' gallery with a genuinely distinctive edge.