The B'ool Sporath
Nemesis: Martian Manhunter
Other Major Foes: Martians
Appearances: one comic story
Powers: Enormous strength and durability, tunneling, mild telepathy, and acid projection capable of liquefying organic matter.
Bio: A predatory animal species dangerous enough to unite Green & White Martians.
Win: Scary Monsters (8-3), The Swarm (?)
Lose: Antares (2/3); B'rett (2-12)
Nemesis: Green Lantern (Alan Scott)
Other Major Foes: Batman, the JSA, Starman, Superman
Appearances: 350+ comics, numerous cartoons, live action TV, musical references, video games, and toys.
Powers: Immortality with extraordinary strength, stamina and durabilty making him relatively invulnerable.
Bio: Cyrus Gold had a miserable, impoverished 19th century life before finding wealth through shady means, and was murdered for it in a Gotham City swamp. He resurrected as a hulking undead menace in the 1940s, and has plagued humanity with his murderous rampages ever since.