Obviously, not everybody can be all-powerful, and have fifty million different powers to render them invincible. Nor can everybody be an empath, because if everybody was an empath there would be no powers to take. For those reasons, we need to put a limit on the powers of players, be it in the amount, the strength of them, or even the power itself if we notice a rise in only that one power.

At the moment, there are only two power laws:

1) You may only have three powers, and they all must be related in some way (i.e., wind manipulation --> flight).
2) You, for obvious reasons, cannot be all powerful. It is possible to take down somebody who is super strong. Your character needs to have an Achilles heel, and that is to be put in your power description.

There are no banned powers at the moment, you will be informed when this is changed, however.