Although there are a handful of plugins like this, only one is updated, and that one simply allows you to be "super" rather than what this one allows you to do; Be Superman!
Features
Armor and head to match superman
Flight
Ability to breath underwater
Ability to take less damage
One hit kill punch to anyone but another superman
NEW IN 1.1! Speed
NEW IN 2.2! Weakness! When superman picks up kryptonite (emerald) he takes 20 damage, A.K.A. one fifth of his max health
Commands
/superman - Display credits for the plugin.
/superman help - See all commands for the plugin.
/superman on - Turn yourself into SUPERMAN!
/superman off - Turn yourself back into a normal human.
