As the title says this mod give you superpowers. I have two ideas on how the super powers work.
1. You make an item that gives you the power
2. You choose your power and it stays that way you can also use experience for upgrades. Also powers wears down your hunger bar do you need to eat a lot when using your powers.
Basic superpower choices:
Shape Shifting(You'll gain the powers of that mod for the duration)
I like this. But I don't think you should be able to give yourself powers in the game. These powers would take place when creating a new world, it would be like choosing a class. At the very beginning you get to choose one power. That power will have pro's AND CONS. To level it out. For instants.
Flying = Flying (duh), no fall damage, but you can't sprint, and must eat more food. (Or something on that order)