This is one of the most terrifying skills the disposal of the Ura-Fuuchouin it allows them to implants a weave into someone's forehead to subjugate and bind them to their will. This is done by breaking down the basic elemental properties that exist within nature and by extension all things in creation, allowing the Ura-Fuuchouin to influence the harmony between yin (will) and yang (physical) energies. By doing so they can manipulate the very spiritual alignment of another beings spiritual power, thereby directing it. Once dominion is established they can bind them to the Ura-Fuuchouin, allowing them access to their perceptions, minds, and control over their bodies at any other time. And if anyone tried to pull out the black thread against their will, their minds would be destroyed.
The weave itself is a conduit which focuses and dictates the flow of power, tapping into the energies that already exist within the earth and matter. It represents the cyclical flow of the world's energies and phenomena and turns that power to manipulable ends. Inside the weave are specific alchemical runes. These runes vary widely based on ancient Onmyōdō studies, texts and experimentation, but correspond to a different form of energy, allowing the energy that is focused within the circle to be released in the way most conducive to the user's desired effect.
Those it is used upon give up there free will to the wielder in exchange for a tenfold boost in power. By inserting the directly into their brains the Cursed Weave opens the body’s chakra’s removing the restraints of the brain on the muscles so 100% of their strength can be used whereas normally, a person can only use 30% of their muscles' strength. Normally the extreme damage this causes would rip the body to shreds. However the Black Threads enhance and revitilize bearers cellular structure making it more dense, resilient and biologically more effective than normal human tissue. In addition the Cursed Weave increases blood flow causing the body to be super oxygenated, improving metabolism, and brain functions while turning the skin red.
The name of the technique comes from the fact that given that most creatures have such conflicting emotions and ideals, it easier to simply control their body, and not the mind itself, almost as if they were a puppet. This is done through a curse. Placing a curse on someone requires the blood of a scapegoat. Once the target attacks the scapegoat they cannot escape the curse. Once that happens, the curse’s power is transferred to the target. As if trusting a sword into your own reflection in a demon mirror.