Reborn, and My Old Master Calls Me Uncle

Synopsis

Six masters broke Yu Han's body to make a weapon of him, then sent him back through time to stop the servant who will one day unify Murim in blood. He wakes at seventeen, so heavy the ground shakes when he walks, so weak that a mosquito can knock him down. He has six months before the traitor claims the Virgin Ginseng, and no way to reach it on land. So he has a stone ball chained to his ankle and starts walking along the bottom of a pool. What he does not expect is that the boys he has come back to save are the same six men who once tortured him.