Naruto: Transform into the Eighth Level of Dragon, Save the Third Generation at the Beginning

Naruto fanfic, invincibility, system, rescue at the beginning, rigorous setting. Travel through Naruto and possess the power of dragons to become the legendary ninja Konoha Soryu Genma in World War II. After wandering for more than twenty years, I came back. During the Chunin Examination, Konoha collapsed. When the Third Hokage Sarutobi Hiruzen was about to use the corpse sealing technique, a big hand patted the shoulder of Sarutobi Hiruzen who was planning to form a seal. "Old man, I haven't seen you for so many years, and I see you risking your life as soon as you come back. This welcome ceremony is too grand."