An arrogant but well meaning high school boy is descended upon by Mesetema, an angel and made into a Nephalem, a human contracted with an angel and a being with the power to summon and control demons so he can fight in a holy war that occurs every 7 years. In exchange for this incredible power, Messiah exchanges his humanity, his soul. This is not a LitRPG/Cultivation story, so if you're looking for something different, check this out!