Blood Geist: Black Death

A very deadly and unique technique within the Blood Geist series, it allows Yosōi to fuse her blood prowess with shadows.

Usage
Yosōi merges with her shadow, granting her intangibility while still enabling her to interact with targets without them interacting with her. This feat in itself makes her extremely dangerous as she is able to move at light speed as a shadow to attack individuals. This literally puts her thinking and actions at light speed. Utilizing the immense speed offered by the technique, she can wipe out entire armies swiftly, as she did in Kumogakurr, eliminating twelve percent of its Shinobi in a day, and that was her toying around. By instilling her will into a shadow via her own blood, she can have it take on a human appearance as well as make it act independently or synchronize with her. If willed, anything that comes into contact with the shadow is consumed and erased in oblivion.

As shown on her mission in, Yosōi can enter the bodies of others and manipulate them to her will. By coursing blood through their bodies, she can destroy them from the inside out or control their mind to implant or erase memories and commands. By engulfing a target in shadow and opening holes in her shadow body, she can for only eject all the target's blood from their body, killing them. By simply hijacking their shadow, she can imitate the Toad Flatness or the Shadow Imitation Techniques, controlling her foes to do her bidding by fighting for her. The shadow is capable of detaching from her body and multiplying, even going as far as consuming objects. The shadow itself can act independently of light sources at the user's will, meaning light sources only affect the user when they will it. Control of the technique doesn't just extend to her shadow, but all shadows within her visual, sensual and/or manipulative range. Having mastered the technique, she can effectively control all shadows within a seven miles plus radius of herself. With such an army of shadows, she could very well take down an entire village in seconds to minutes.