Leon, the son of a down-and-out baron, was abandoned by his family on the eve of his coming-of-age ceremony and returned to the abandoned castle in the north with only an ancient ring. In the underground dragon tomb, he awakened the obsidian dragon blood and ancient alchemy inheritance. From the ruined territory to the Kingdom Academy, from the black iron veins to the ruins of the gods, Leon gathered followers step by step to build his own dragon-born force. The nobles despised him, the Holy See judged him, and the ancient powerful coveted his blood. But he only believes in one thing: the weak have no destiny, and the strong cast the throne with their own hands.