Heavenly Blade: Red Blood (1 Book 0) (English Edition)

Heavenly blade is a fantasy that describes the relationship of the brothers Jhacob and Dalton, who moved by jealousy and gain kills his brother Jhacob, then king of Firdus, Dalton makes a pact with the demon Globius to have the crown of his brother and in return He will release the demons from his ancestral prison, bringing the demonic terror to the world after centuries of apprehension.
His events occur between the deliverance of the demons and the emergence of the one who will repress the demons again and remove Dalton from his usurped throne.