I recommend the light novel, Doujinshi," Douluo: Sign in at the beginning of the game." The main character, Lin Feng, transmigrated to the Douluo Continent and possessed the Multi-Pupil Technique. He signed with the Azure Oxpython at the beginning of the game. In order to ultimately belong to him, he constantly challenged powerhouses and struggled to grow on the Douluo Continent. I hope you like my recommendation.