Death Note

I know this manga/comic "Death Note" is rather old.. And the reason I'm writing about it is because I was re-reading some of my comics and I saw a trailer for a sequel for Death Note the movie.. So perhaps the idea and all is worth a mention.
In case you have no clue, "Death Note" is based on a note book, which bestows its user the power to kill others by writing their name on the book.
The book, was dropped by a death god in his boredom and picked up by a kid who was bored. And this turned into an epic battle between 2 person of great intellect.
My point is, when a human is given the power (to kill) or absolute power over others, or the ability to instill fear into them, they change. They believe they are different. Better than others maybe. And in David Gemmell's books, it's the same.
Power Corrupts.