Awakening of Supernatural Powers, One Punch at the Beginning and the Beast King Is Instantly Killed

A strange man appears in the world, wearing a black robe. He kills the ancient beast emperor with one blow and shocks the world. All kinds of humiliation, repaid a hundred times, personally crushing the overlord family to pay the blood debt One person writes a legend and fights the world alone. What is invincible? What is undefeated? "When grandpa was a child, there was a legend that there was an immortal who came to the world. He destroyed the beast king, killed the tyrants, created mountains and rivers, and changed the world. The supreme god king couldn't breathe like a human being, and the ancient ferocious beasts couldn't bear fleas on his body." "Ah, who are you talking about me?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.