I Am Deducing Infinitely in the Prehistoric Times

"Monsters are almost extinct? Don't be kidding, how many have I killed just now? I have said more than once that the act of slaying monsters is very worthy of promotion." … Many years later, Su Mu looked at the scene in front of him: "I have said more than once that the act of slaying demons is very worthy of promotion, but you cannot kill them indiscriminately. You must care for them like endangered animals." … After that. Bad news: practicing martial arts requires lifespan Good news: you can use monsters. "Practice? I never practice." "Wait a minute, don't leave this monster. Your longevity is quite destined to mine, so I'll let you watch it later."