Chemo

Chemo is a giant, humanoid plastic container that absorbed various failed chemical experiments over time, eventually coming to life as a mindless but devastatingly toxic villain capable of spewing corrosive chemicals — a recurring menace to DC's Metal Men since 1965.

Bubbling up from the Silver Age imagination of Jack Schiff and Win Mortimer, Chemo made a memorable entrance in Metal Men #14 in 1965 — and this DC villain has been a lurking chemical menace across more than five decades of comics ever since. With two key-issue appearances to their name and a presence stretching from Metal Men to DC Universe: Legacies and even the ambitious Wednesday Comics anthology, Chemo has proven surprisingly durable for a figure born in that wonderfully weird era of sci-fi-inflected superhero storytelling. The company this character keeps speaks volumes — sharing pages with titans like Superman, Batman, The Flash, and Green Lantern confirms Chemo's place not on the fringes but squarely within DC's broader universe. For collectors who love Silver Age strangeness with genuine staying power, Chemo is exactly the kind of deep-cut discovery that makes digging through DC's history so rewarding.