Insect Repair

I was a normal person when I was helping my grandfather cross the road. I suddenly fell down and was crushed by a passing truck. I time-traveled into the body of a powerful man who wanted to die. The powerful man said thank you to me before he left. The arrival of the system caught me off guard. Practice? How can I practice even if I am invincible? The one-horned immortal, the army of dung beetles, and the mantis strikers, let me defeat them. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.