Nuclear-powered Sword Immortal

"Eternal Core."

Gu Jinlai perceived the newly formed core inside him after the "Three Realms" Cultivation Technique had been stripped away.

This core was no longer like the one condensed by the "Three Realms" Cultivation Technique.

Although there was still a Void Space inside, accommodating the power of Heavenly Fire and Cave Heaven Stone, its main developmental direction had changed.

It was expanding in size.

Now, as the cultivation technique improved, the core became more stable, and he could directly double the volume of the Eternal Core.

"Constant Stars are the protagonists in cosmic material, playing a decisive role in material evolution. Their main structure consists of hydrogen and helium, deriving more materials through internal fusion reactions. As their volume increases, they gradually evolve into stronger massive celestial bodies, such as neutron stars and black holes."

Gu Jinlai deeply understood these processes through the reverse derivation of the "Supernova Explosion" trait: "During this process, as neutron stars and black holes form, they will scatter material outward, gradually evolving into new constant stars, while those that become black holes will form the centers of galaxies, maintaining the stability of the entire galaxy."

Stability.

Growth in size requires stability.