I Cultivate Stellar Core Fission in My Dantian

Yu Wujie: Everyone else is gathering oceans of spiritual energy. My ancestor figured out how to build a spiritual-energy nuclear power plant inside the body, with a spiritual-energy nuclear bomb at its core. Li Taiyuan: So the people I meet are all protagonists, and I was just a side character after transmigrating to another world? Long Tiantian: Is there really no one who can put up a fight? Is there no one left in this world who can take one punch from me? Being invincible is so lonely. Yu Wuchen: Wujie, look at this black vortex in my dantian. Doesn't it look like the star-core black hole the ancestor talked about? Yu Wujie: Big bro, you're amazing. That's all there is to it. Don't show off in front of me.