I recommend the following novels to you: " The Undead Queen Reborn in Another World "," Number 34 "," Quickly Pass Through the Dark Series Villain Prince Charming "," Dark Spirit Clan ", and " I Pretend to Be a Divination God in a Fantasy World ". These novels all have a dark style, coupled with the protagonist's high IQ and the suspense plot, I believe it will suit your taste. I hope you like my recommendation.😗