In the first season of "Black Deacon", the deacon joked that humans can lie, but demons can't, but in the second season, the deacon tricked Charles into killing his relatives. It is illogical.

The devil is the devil after all. In the first season, the so-called "don't lie" just means that people don't really care about their masters like human beings. They are sincere about the master's work, and their purpose is simple, just for the soul!

So it doesn't contradict the second season. In the second season, I lied to Charles to rekindle the fire of revenge and make the soul more delicious. The devil can get a more delicious soul! The "lying" in these two seasons is not contradictory. The first season refers to not being as selfish as a human deacon, but serving the soul of the master wholeheartedly; The second season means lying to get a delicious soul. That's how it is understood. That's right! You can ask me again if you have any questions.