Quintessence (Alpha)

"Do you know why the Gods reign supreme, heralded as the powerful of races? It's because of this singular energy that's exclusive for their use. It's the very thing that gives them their various powers and allows them to forge reality to their liking. It's this singular form of energy that decides the fate of all that either ally with or vehemently oppose them. Yes, quintessence is the pinnacle of all known forms of energy, unsurpassed by any other."

- A God stating the reason why his kind is considered to be the most powerful.

Quintessence (神髄, Shinzui) is the mysterious substance that makes up the known universe and predates all other forms of energy known to all living beings; it's considered to be the "Echelon of Pure Might" (純然力の位, Junzenryoku no Kurai) and remains unmatched by all other things. It's this power that gives the Gods their standing in the universe and serves as the prime basis of their power — Theós Dýnami (, Teosu Dainami; Greek for "Godly Power", Japanese for "Highest Authority of the Divine Race"); it's considered to be exclusive to them — specifically Pure Gods.

It's often referred to as "Aether" (, Ēteru; lit. "Ethereal Substance of the Otherworldly Plane") by many scholars and magical experts and said to be the only thing capable of absolute creation and destruction, invoking Magic Phenomenon on a whim.

Trivia

 * This is based on the mystical Aether, a classical element that's found above the terrestrial sphere in Greek mythology and philosophy. It's was used in several theories to explain several natural phenomena, such as the traveling of light and gravity; in addition, it's often referred to as "the fifth element".
 * The energy was created by the author to match the role of Gods over other creatures in his storyline. He also wanted to play around with an element that's only existed in mythology alone.
 * Since it's the highest known substance, it's unaffected by all others coming after, which would match the god's invincibility against all other weapons and techniques, sans ones created through this energy.