Their intelligence makes them dangerous because they can anticipate the moves of their opponents. For example, a smart villain like Hannibal Lecter in 'The Silence of the Lambs' can analyze people's motives and weaknesses just by observing them. He can use this knowledge to manipulate and outwit those who are trying to catch him.
The smartest villains in fiction are dangerous because they can turn people's own virtues against them. Voldemort in the 'Harry Potter' series is a great example. He knows that people value life and love, so he uses these things to his advantage. He targets Harry's friends and family to try and get to him, and he manipulates the wizarding community's fear and prejudice to gain power.
Chapter 753, "Final Judgment", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event.
Chapter 721, "Apology", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. It opens with Jiang Li's car had just passed a traffic light when a phone call... and closes on Jiang Li's words continued— "If I'm not wrong about your facial....
Chapter 706, "How Did a Good Person Turn Out Like This?", is the clearest early answer because it turns President Sun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Inside the building, President Sun and his group watched Zhao Lang...
Chapter 851, "Peace Charm", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with She initially came with the expectation of becoming the Gu Family's...
Chapter 703, "Slap Oneself", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. Early on, Wu Daoshan quietly raised his head to size up Zhao Lang, and sure.... By the end, Young Master Gu was intending to back Jiang Li..
The best chapter pointer here is Chapter 3, "Madam, the eldest young master has been missing for over half a month". It opens with Qiao was still annoyed at the attitude of this unknown girl when she heard... and closes on Jiang Yan, forced into a marriage with someone he did not love, had....
Chapter 13 is the strongest chapter-level answer because it starts from Sensing that something was off with Jiang Yan, Jiang Yan dismissed the... and follows through on How could this happen..." Lin Manru didn't want to hear any more of her....
The best chapter pointer here is Chapter 9, "The Qiao Family's business isn't big, but they have quite the audacity". It opens with Exactly, the Qiao Family isn't that great either. and closes on Qiao, unable to save face, slapped her daughter across the face, "Didn't I....
The best chapter pointer here is Chapter 25, "He's Actually Mr. Shen's Son?!". It opens with Therefore, from his childhood, Jiang Shixu had felt an extreme aversion to... and closes on Having worked beside Shen Lan for over a decade, she had been there when....
Chapter 734, "Are These Primary School Students Arguing?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Old Sir Jiang was especially happy.. By the end, Jiang Yan had to return to the set as well..