The System Asked Me to Study Quietly for Three Years First

Lin Nian accidentally obtained the system and traveled through the Tianling Continent. Who knew that the system asked him to practice silently for three years! At first, I thought it was bundled with a badass system, but I didn't expect that the system would pretend to be a pig and eat a tiger, and it would be able to use any skill... The three-year period has come, and Lin Nian thought that he was about to start his own path to invincibility, but he didn't expect that his pet would almost be transformed by him just after completing his three-year training mission... Lin Nian, who thought he had no background, turned out to be...