Mercury

One of the most venerable names in comics history, Mercury made their debut all the way back in 1907 — deep in the Platinum Age, when the medium itself was still finding its footing — making this a genuinely rare piece of comics prehistory. With appearances spanning an astonishing 118 years across titles like Life, Mysteries of Unexplored Worlds, and Big Bang Adventures, Mercury has drifted through eras and publishers in remarkable fashion. The company here is mythologically rich, sharing pages with the likes of Venus, Neptune, Mars, and Jupiter, lending these adventures a cosmic, pantheon-scale atmosphere. A catalog count of just three appearances makes Mercury a true collector's curiosity — the kind of obscure, long-lived figure that rewards the dedicated digger.