nedjer
Adventurer
"corruption" is not about what you are, but what you do, and the evil acts have to be supernatural. Demons and undead should emit an aura of corruption. Humans only do if they comitted unspeakable acts. Items and places can be tainted by corruption, too.
This is quite like what's in clone Corruption. But detect evil isn't altered. Ain't much use though if there's loads of evil everywhere.