Others Cultivate the Golden Core, But You've Turned Into a Black Hole?

[Fantasy + Cultivation + Action-Packed Battles + System + Single Female Lead]

[Cultivation Levels: Initial Realm - First Realm - Second Realm - Third Realm]

Standing at the pinnacle of the cultivation world, Yun Bai looked back on his past. He had once jumped into a black hole to travel to the cultivation world; he had once forcibly refined his golden core into a black hole; he had once created a black hole with his bare hands and slaughtered all in his path; and finally, after undergoing tribulation and ascending to immortality, he had actually cultivated into a black hole! A star with excessive density becomes a black hole. Can a cultivator's spiritual energy density also become a black hole?