First Appeared In:
Detective Comics #483

Who Is He?
He starts out as a history teacher. Do you need to know more? He descends into insanity after losing his wife and re-imagines himself as a crimelord. Batman: The Animated Series retconned him as a CEO of a shipping company who went insane and developed a god complex, which is only marginally cooler.

Powers:
None, though he uses a lightning gun in the cartoon.

Why He's Forgotten:
History teachers have always been figures of mockery, not fear.