You Are Asked to Contract a Beast, and You Sterilize the School Belle's Beloved Pet?

Global changes have given rise to countless restricted areas, ancient beasts, and mythical creatures. In the year 2100 of the Federation, during the third war between alien beasts, humans became losers and became slaves of alien beasts. Zhang Xiu opened his eyes and found that he was reborn twenty years ago, when beast control was at its peak. He was surprised to find that when he helped the school belle sterilize his pet, he could actually absorb the pet's emotions, draw a lottery, and get rewards! So relying on the knowledge of beast control in the future, he opened up hidden evolutionary routes. An S-level spiritual heart of the earth evolves the scaleless fish into the king of the river! An SS-level Danxia grass evolves the spiritual circle snake into the world snake In this life, he will rewrite history and shoulder the heavy responsibility of saving human civilization! From an underappreciated pet neuterer to a god-level beast master! Cultivate pet beasts from soldier level to eternal level!