Supreme God of War and Slaughter

This is the story of a man who was born in the wrong time. Modern day wasn't great for him, all due to his desire for bloody battles. As the laws generally prevent such a thing, he turned to the dark side of the world, being lucky enough to chance upon the opportunity to enter it, fighting for his life daily, which is what he wanted. Until one day something inexplicable happened, resulting in him going on the most crazy journey of his entire life.