We're Still in School, and You Dropped Out to Build Your Foundation?

Su Mochen transmigrates into a world plagued by spiritual qi revival and rampant corruption. Cultivation is flourishing here, and practitioners bask in every kind of glory. Once a student at a cultivation academy, he was determined to become the strongest practitioner. But after a bizarre invasion shattered his Dao Root, he was forced to drop out. Su Mochen knows that the cause of all this was competition for resources. Though his Dao Root was shattered, he also came away with a blessing in disguise. He reforges his Dao Root, cultivates both the immortal and the supernatural, and doubles his cultivation speed! He can completely absorb the spiritual energy in tainted spirit stones that are useless to everyone else. Some time later, the youngest Foundation Establishment cultivator, at just 15 years old, reaches the top of the cultivation rankings. Then one day, Su Mochen makes the news. The class group chat explodes: We haven't even graduated yet, and you, the dropout, have already reached Foundation Establishment?