There is a black hole in my dantian

Lin Lang discovers a mysterious black hole vortex in his Dantian, granting him unique powers to aid in his cultivation journey. As a time traveler with a mission to guide his past self, he must navigate the challenges of practicing with this newfound ability. Dive into a world of Xuanhuan fantasy filled with alchemy, cultivation, and a determined protagonist striving to uncover the secrets of his special abilities.