The Legend of Douluo God of Killing

He is a terrifying existence in the world of killers. His code name is the God of Killing. His mission has never failed since his debut. However, in the last mission, he encountered the creation object and asked for five wishes from the old man of creation. He inherited the throne of the God of Killing and came to the Douluo World. What kind of legend will he bring here... This is my first time writing a novel. I have to learn a lot of things slowly. Please forgive me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.