Half Saiyan in Tales of Demons and Gods

tales of Demons and Gods Fanfic .
half Saiyan martial artist and a magician that originally was from modern world , in his last his death , he discover that his body owner origins are from the world of TDG, and with help of some weird book he went back in time, in this third life he will try to raise again as the strongest fighter and save everyone he lost in his life.