Ultimate God Of Death

*He was absolutely not the world's most powerful mercenary, but he was undoubtedly the most annoying one — a man who can never die！
Because of a genetic modification, he obtained an almost immortal constitution. Somehow, in addition to relying on killing people to make money, he also became the world's happiest “HERO”...
As the mercenary with a cheap mouth, the immortal who could not be killed was also called as "the god of death".
And this is his his adventures !