In the world of "Ghost Slayer", the "ghosts" are all mutated by the ghost king Wu Mian by injecting his own blood. He can control the thoughts and will of the ghosts, and has the absolute power to live and kill the ghosts, and the ghosts are also harmonious. Like no misfortune, it has the characteristics of cannibalism and fear of sunlight.    Demon Slayer 
Wumai was actually the son of a wealthy family born in the Heian era. He was frail since birth and was on the verge of life and death. A good doctor with superb medical skills continued his life through special medicine, but Wumai once misunderstood his health. Deteriorating, killing the doctor in anger. After the doctor died, he discovered that the body not only recovered, but also had an immortal body, but he had to eat people to survive and was afraid of the sun. In order to overcome the sun, Wu Sui created a large number of ghosts as eyeliners, looking for the "blue flowers of the other shore" for key medicinal materials, and also used ghosts to fight against the ghost killing team against him.    

Demon Slayer Trainers UK
The villain's ghost will affect the strength of combat power according to the amount of blood given by Wu Mi. There are individual differences in whether or not they can withstand the energy brought by blood. Generally, ghosts receive less blood, but ghosts with supernatural powers absorb more blood. You can use "blood ghosts" and have their own special moves. The twelve ghost month that absorbs a lot of blood and has the strongest combat effectiveness is the twelve ghost month. The twelve ghost month is divided into six upper strings and six lower strings.