Douluo Dalu: Becoming a God by Borrowing Lifespan

Li Changqing transmigrates to Douluo Dalu and awakens a lifespan System. He immediately bets all eighty years of his life to awaken the ultimate setup from the first Douluo game: Twin Martial Souls, along with the System's random lucky-bag feature. After he begins cultivating, he grows stronger and stronger to make up for the lifespan he wagered, replenishing his own years by slaying living creatures. P.S. Some characters are based on the manhua versions.