Falling Star, Fate Weaver

Si Xing was once the Star Lord of Fate, who controlled the life paths of ten thousand people. Five hundred years ago, to shield the mortal world from a world-ending calamity, he was instead falsely accused of altering the Emperor Lord's fate, and was twice cast down to the mortal realm, becoming a laughingstock across the Three Realms. When he returned for the third time, he couldn't even gather enough spiritual power, and crashed headfirst into the Emperor Lord's golden hall, still clutching half an unfinished flatbread in his arms. No one knew that Fen Xing, the dreaded malevolent star of calamity from the depths of Guixu, had been waiting for him for a full five hundred years. Five hundred years ago, it was Si Xing who picked him up from the mud, barely alive, and said, "Fate is guided by the heart, not by heaven." After that, he jumped into Guixu, tempered his bones into absolute power, and one by one picked up Si Xing's shattered fate stars, silently guarding him for five centuries. When Si Xing returned for the third time, the two descended to the mortal world together to resolve calamities. Behind a series of bizarre death cases, they pointed to one shocking truth—the source of the world-ending calamity five hundred years ago was the Emperor Lord himself. Fate is inherently evil—are the mortal beings worth saving? Si Xing looked at the person beside him, covered in wounds yet stubbornly shielding him, and smiled as he gave his answer. "The mortal world is too vast; I'll first protect the one right in front of me." — Description from novelcodex.org