The Giant Genie
Nemesis: Martian Manhunter
Other Major Foes: None.
Appearances: One comic story
Powers: Giant-sized, super-strength, invulnerability, flight and destructive eye beams.
Was commanded by mobsters to commit robberies and fight Martian Manhunter to a standstill. Hoods were eventually tricked into dismissing their genie.
Lose: Aroo (1-3)
Other Major Foes: The Demon Etrigan, the JSA
Appearances: 25+ comics.
Powers: Plant Control, illusions, weather manipulation and immortality.
Bio: Ancient druid high priest who became trapped inside a tree and lost for centuries. Uncovered, Thorn used his giant wooden form and magic to plague modern heroes.
Blackbriar Thorn rapidly loses his powers when uprooted out of the earth. The Genie of Gensu essentially cannot be harmed physically, and constantly picks up heavy things to fly off with. Genie trumps wizard.