The Exterminator|Doom x Male Reader

Demons. People have theorized for many years if there was any other forms of life outside of just humanity, and it turns out they were right, however not in the way they thought. While it is true that there are intelligent life forms other than humanity, most of these life forms do not care for human morals or rules. They simply seek to destroy, and live according to their own malevolent desires. Unfortunately for humanity, most of these life forms are superior to humans. They wield super natural abilities and are unaffected by most man made weapons. However hope is not gone. Y/N L/N is a man born with no past or parents, he wields unfathomable power and simply exists to do one thing and one thing only. Exterminate Demons.