I Was the Sun for Five Billion Years, and Then I Became an Immortal

I've been the sun for billions of years, and I'm tired of living. Until I collapsed into a black hole, and when I opened my eyes, I had become an infant in the world of cultivation. They tested my spiritual root, but the spirit stones didn't react at all. I felt like something was missing from my body, and then... my spiritual root grew on its own. They taught me magic, and I learned it in one glance, even optimizing it a bit. They said I was too bloodthirsty, and I said, "Gentlemen, please die here." I originally wanted to be an ordinary cultivator, but everything seems a bit off.