A Gatling Against an Empire

E-rank half-dragon prince Arthur, exiled, besieged by bastard brother Jaren—who stole the throne with dragon blood. Cornered, he slips into modern LA. Earning cash by brute strength, he brings back food, antibiotics, gatlings, RPGs. Against Jaren's army, Arthur unleashes modern firepower. They worship him—but Jaren, now a black dragon, returns.