The Oddball Cultivator

Lin Chen, an engineering grad, got a free-fall trip off a cliff during his graduation travels. When he opened his eyes again, he had become the good-for-nothing eldest legitimate son of a cultivation continent, his cultivation crippled.

Right after transmigrating, he was humiliated by his second younger brother's killer move, then forcefully dumped by his fiancee. He later discovered he had been adopted, and agreed to fight his fiancee again in three years.

At the brink of despair, an eccentric cultivation capitalist System awakened, offering a reward from the start: a book of tricks for fooling people."

Three years later, he defeated his fiancee and dumped her on the spot. Then he entered a sacred sect and embarked on an unconventional cultivator's path, while also searching for his mother, finding his father, taking a wife, becoming an Immortal Emperor, and attaining the Great Dao.