The following are some examples of weapons that could suck blood in novels: The Nine Serenities Scripture that Xiao Yan used in 'Battle Through the Heavens' was embedded with a weapon called 'Black Horn Silver Needle', which could absorb the enemy's blood. In "The Pinnacle of Martial Refinement", the protagonist Lin Zhentian used a weapon called "Blood Blade Flying Flower" when he was practicing martial arts. This weapon could absorb the enemy's blood to enhance his own cultivation ability. 3. In "Full Time Expert", Ye Xiu used a weapon called "Shadow Sword" that could absorb the opponent's energy to increase his own strength. In "Douluo Continent," Tang Wulin used a weapon called "Soul Ring" that could absorb the souls of surrounding creatures to enhance his strength. In these novels, the weapons could suck blood to better show the protagonist's powerful strength and skills to enhance the reader's reading experience. However, it should be noted that this setting may bring some negative effects to the novel, so the author needs to pay attention to balance and rationality when using it.