Energy is the main "currency" in the game.
But you can't own it. It's a dynamic flow.
It's main quality is lightness, which is defined by the direction of the flow:
All the energy flows all over the world is constant. If it disappears in one place, it appears in another one.
Feelings and weather systems are based on the energy flows of the creatures in that place.
If you look closely at an energy particle, they are actually alive and smiling or sad, depending on the flow direction/lightness.
They're don't have names and are not named.
And they're the ones creating feelings. Creatures can feel because of these alive energy particles.
Energy can be used to craft objects. It doesn’t consume energy to make an object. Once the object is dematerialized all the energy is returned to the creator. But materialization of objects requires high energy capacity and the max lightness.