Quintessence

Quintessence is a very special type of power that is usable only by the Goddess of the Sun and Stars, Ōhirume. This special type of magic power is formed with the help ethernano and the unique composition of her body.

Description
Just like a normal mage Ōhirume's body is constantly drawing in ethernano from the atmosphere. If she had magic power this would be the point where the ethernano will draw upon the properties of her soul to turn itself into magic power. However, this isn't what happens. Instead, the ethernano draws upon the attributes of the stars that her body possesses because of how it is composed of stellar energy. This turns the ethernano into a massless and formless type of power called Quintessence. Once created Quintessence will remain in her body.

Unlike things like magic power, Quintessence doesn't have a natural state that it can exist in like how magic power's natural state is energy. Instead, what form it takes differs depending on what Ōhirume needs it to be. If Ōhirume is losing a lot of blood and needs more of it then Quintessence will take the form of blood, if her body isn't physically strong enough to take on an enemy Quintessence will take the form of raw physical power to augment Ōhirume's physical strength, if she needs energy to use magic than Quintessence will take on the form of energy, etc. Its energy form is highly potent, strong even than curse power. This allows the magic that Ōhirume uses to exponentially more powerful than normal, Solar Magic in particular. Her Solar Magic is so powerful that leaves God Slayer Magic in the dust. Power isn't the only benefit using the energy form of Quintessence to use magic. It makes using magic a lot easier for Ōhirume. So much easier that spells that are would be extremely difficult to perform can be performed as if it was nothing.

Usage
To control Quintessence Ōhirume doesn't need to concentrate a lot like Magic power or open herself to an emotion like how Curses require the user to open themselves to their negative emotions. In fact, manifesting and controlling Quintessence is intuitive and effortless for Ōhirume because of closely merged it is to her subconscious.