A New Kingdom To Be Awakened

Humanity, with a long history of defending their own kind have started to uses forbidden magic banned by the gods upon mortals. Among the 7 races, dwarfs, the weaponry masters, elves, nature's friend, harpies, the aerial masters, subterraneans, the underground conquerer, beastmen, having sharp senses, dragons, the most almighty race but have the smallest population, and lastly, humans. With their back against the corner, one of the almighty dragons was killed by humans in it's nest when it was sleeping, using the most powerful forbidden magic that they know. The dragon's dead body was left there without anyone touching it. Since it's body was now surrounded by forbidden magic traces, none dares to even take a step closer. One day, our protagonist was reborn into the dragon's body by dying in an accident. This is a story about the human who originally came from earth, transferred into the dragon's dead body and make a kingdom with his own hands. But will the world notice his intentions?