A brief description of the manga I Am the Angel of Death:
A long time ago a gate appeared in the sky that connected our world with the world of monsters, and just as suddenly extraordinary humans known only as the “Awakened Ones” emerged. Their mission: to stop monsters from emerging by finding the keys. It is now the age of the Awakened Ones! In the eyes of the Awakened Ones ordinary people are as insignificant as ants. Fang Wanjie was one such person. As he was about to die, he finally obtained the power he had always desired! Yet this power made him regret his entire life…