User blog comment:Epakrios/Plot holes/@comment-5619706-20140123133436/@comment-79.115.69.124-20160207162319

Cain didn t became a demon after he killed his brother, he was just baried the mark and the mark corupt him to kill people and he kill himself and after he kill himself he was born again as demon , the frist knight of hell , after that he became the deadliest demon that walk the earth.