My Pets in Fantasy Are All Ancestral Beasts

This is a bizarre, mysterious and dazzling world of pets. Many years ago, animals and plants began to mutate crazily and return to their ancestors. Powerful and irresistible spiritual beasts occupied all parts of the world, while humans were reduced to the lowest level of creatures. After years of hard work, a brand new profession has been born among humans, the spirit master! They rely on subduing, cultivating, and training spiritual beasts to make themselves stronger. Sun Yaohui, a young spirit master, accidentally received a pet upgrade system. From then on, all the pets he carried could be cultivated to the level of ancestral beasts. From then on, countless spiritual beasts chased him to be cultivated by him, and countless spiritual beasts expressed their determination to follow him. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.