Dad Called Me to Save the World

That day, the Eight Ancient Demons woke up. Moon, mountains, wind, thunder, water, fire, earth, and sky. The eight demons are the embodiment of the ultimate power in the world. The ghost army that is ready to move, the demon minions all over the world, the undercurrent of dark forces, and the heroes who fight bloody battles for the human race... In a strange and mysterious alien world, in an era ruled by the Eight Demons in ancient times, can the remaining humans fight back? In the sky, a beam of light descended from the sky, illuminating all directions. The young man's figure slowly walked out in the blazing white light. System: Young man, congratulations on becoming the host of "Ten Halls of Yama". Dad: Welcome to the Heaven Realm. You are the ninety-ninth god summoned and the last one. Please fight for the hope of the human race! This is the story of a boy slaying demons.