Douluo: Two Dragons of Ice and Fire, Invincible All the Way

Jiang Yu, a medical student in his previous life, somehow traveled to the Douluo world and became an orphan of the Blue Lightning Tyrant Dragon Sect. Because it was Luo Sanpao who awakened his martial soul, and because of his innate soul power level 0.5, He was discriminated against by everyone in the Blue Lightning Tyrant Dragon Sect. When he was eight years old, he was expelled from the Blue Lightning Tyrant Dragon Sect on the charge of "theft" and deprived of his "Yu" surname. "Hmph, I don't care about the Thunder Tyrant Dragon Sect and the 'Yu' surname!" Jiang Yu left the Blue Lightning Tyrant Dragon Sect, relied on modern medical techniques to cure Queen Tiandou, and became Viscount Tiandou. Rely on the knowledge of the previous life to build pistols and grenades. The routine is lonely and Bo, and you get the Ice and Fire Eyes. In the two eyes of ice and fire, he absorbed the power of the Dragon King, and his martial soul evolved, turning into the twin martial souls Ice Dragon King and Fire Dragon King. This is where Jiang Yu's invincibility begins. Tang San: Damn it, what kind of hidden weapon is this? It's actually more powerful than my Tang Clan hidden weapon. You already have a way to kill me! Yu Xiaogang: Damn it, Luo Sanpao is the same martial soul, why can his martial soul evolve? It's not fair! (Not joining the group, torturing Tang San, multiple female protagonists...)