Blood manipulation is a high-stakes power system where characters command the very fluid of life to achieve absolute dominance. In the world of webnovels, this tag often features protagonists who master forbidden techniques, transforming their vitality into lethal blades, defensive barriers, or even parasitic curses. Common tropes include the rise of the misunderstood hemomancer, bloodline awakenings, and the constant struggle to balance immense power with the physical cost of use. Readers are drawn to this genre for its darker, more tactical approach to combat and the satisfying progression fantasy elements as heroes refine their essence. Whether it is a vampire refining their noble lineage or a cultivator tempering their body through blood essence, these stories offer a gritty, high-octane experience that pushes the boundaries of traditional magic and martial arts.