The main reason Ling Chen was playing along with them and acting stupid was that he wanted to know what Old Yan and the others were planning.
Now that Old Yan has spilled all the beans and even poisoned his comrades, he didn't have any reason to play pretend anymore.
Furthermore, even if he wanted to continue, he couldn't as the Great Luo Martial God has already blown his cover.
Though Ling Chen was still calm and composed, deep down, he was extremely shocked. He didn't see any of these coming at all.
Whether it was the fact that all the Demon Gods have already been subdued by one of the Great Luo Martial God's subordinate, Old Yan poisoning the Demon Gods and the Human Demi-God experts, or even the sudden appearance of the Great Luo Martial God, each one of these events was more shocking than the other.
He already knew that Old Yan was conspiring against him, however, he was completely oblivious of his other schemes.
