Lucy: Gods and Demons. Demon Prince

You've probably noticed that Earth has not been taken over by demons. No thanks to the Chosen One or Athena or any of the other fashion-challenged Earth gods. You can thank me. Lucy. Demon Prince. The bad news is that I've decided to claim the Earth for my own-and not share it with anyone or any other bloodsucking, murderous demon. Worse news... I'm slowly losing my demonic powers, which is going to make it really hard to take over the world.
Especially when you have creatures even more evil than me trying to do the same thing. And now ordinary humans want to get in on the game too. A new technology has surfaced, giving anyone with a pulse superpowers. Athena and her fellow Judges want me to destroy this technology. Whereas, my benefactor-the one who owns the mortgage to my McMansion-wants me to steal this technology and bring it to him.
I'll have to betray one of them and deal with the unpleasant consequences later. Which could mean making a bargain with an all too powerful dead god. All this drama to save the world... simply so I can rule it.