I’m Just a Forced Fake Lord, Aren't I?

Lin Feng was living an ordinary modern life when he woke up in a world of cultivators. He wandered into the forbidden ground of the Qingyun Sect and took in what was left of the power of a Daoist called Tongtian, which he did not notice happening. The Blood Shadow Sect came for the sect while he was standing there, so he passed himself off as its ancestor. He said whatever came into his head. The disciples and the attackers both took it for doctrine of some kind and the attackers withdrew. He then took on a disciple, a young man named Ye Wuhen, who was a spy for the demons. In the middle of a lecture, without meaning to, he said the thing that gave away the demons sitting among his listeners. Ye Wuhen dropped the act and called up the Demon Lord, and Lin Feng, who still did not know what he had absorbed in the forbidden ground, swung at him.