Celestial Energy

Celestial energy is energy that forms the celestial world and plane of existence. From it, the celestials are also born and it gives them power.

Celestial energy is creation of the mortals in a sense, as it emits from their spirits on its own. This explains how they are capable of wishing for gods to exist. Celestial energy can exist in the mortal world, but only for short periods, like a week. Nothing in the mortal world supports the existence of the energy, and so it slowly fades.

But the energy doesn't completely disappear, as energy can not just disappear. It would move to another plane of existence, the celestial plane. The realm is forever expanding, as long as there is life in the mortal world.