The power that resides in every Cursed and Blessed, thus they are called. Cursed energy or power is the negative and dark power that flows from Hell. Blessed energy or power is the positive power that flows free from Heaven.
The understanding of these two powers is very limited and truthfully up to the interpretation of each user. It'll tell you your limits, but if you are talented or creative enough, you can turn that power into something truly fantastical.
The very basic way to describe what these powers allow is this;
By fueling the power of whichever source through your body, you've become a conduit. A living and thinking conduit of pure chaotic or beautiful power. Through much practice and discipline of the mind and body, the power can allow for things no normal person could do.
You can shoot it from your palm as a blast of energy, or, for the more skillful, you are able to turn that power into a material manifestation. Fire, Water, Wind, etc.