I Transmigrated as a Good-for-Nothing, but Became a God with the Strongest Classic of Mountains and Seas System

[Transmigration + cultivation + System + feel-good power fantasy] After Yao Yijun dies, he transmigrates to a world of cultivation and becomes the foremost heir to a family wealthier than kings. He also successfully activates the most powerful Classic of Mountains and Seas System. “Miraculous pills and medicines? Buy them! Buy them all!” “You’re the Dragon Emperor? Sorry, buddy, there are seven or eight dragons in my Mountain and Sea Realm, and every one of them is at a higher cultivation level than you.” “A god-tier powerhouse? Could you beat Pangu?” Faced with Pangu, Donghuang Taiyi, other primordial true gods, and an assortment of ancient ferocious beasts, the three god-tier powerhouses of the Shenying Continent cower and tremble in a corner.