The common dark animations in web novels included but were not limited to the following: 1. The Ghost Blade: It tells the story of a world protected by the Ghost Hunters, but the protagonist, Tanjiro, unexpectedly becomes a member of the Ghost and starts a fierce battle to save mankind. The animation was full of horror, suspense, and dark elements. 2. The Gate of the Stone of Destiny: It tells the story of time travel, where the protagonists conduct a series of experiments in order to change the past. The experimental scene in the animation was full of mystery, strangeness, and dark elements. 3. Death Note: It tells the story of a genius high school student who wants to obtain the invincible Death Note. The dark elements in the animation included justice and evil, human nature and morality. [4] The Fullmetal Alchemist: It tells the story of two equivalent exchanges. The protagonists experience a series of adventures in order to obtain true alchemy knowledge. The dark elements in the animation included equivalent exchange, distortion of human nature, and moral decay. 5. A derivative work of " Ghost's Blade "," Ghost's Blade: Moon of the String ": This work is a continuation of " Ghost's Blade ". It tells the story of the protagonist, Tanjiro, fighting against the ghosts and also adds some dark elements.