| abstract | - The speed of the consumption depends on the skill of the user, and the death of the target depends both on the skill of the user and the amount of life force that the target possesses. Since this technique is created from Yin, the user has the ability to create it almost anywhere within a certain radius, that radius differs from one user to another. This dark substance is intangible when first created. When the technique starts absorbing the life force, which is the Yang of the target, the lack of balance in Yin to Yang ratio begins to decrease and they approach equilibrium. When equilibrium is reached, the technique stops the absorption of life force of the target. This is a flaw of the technique. However, over the years, users of the technique began to create ways to get around this flaw, one of them being to absorb the Yang present in the substance, another it to increase the Yin to create an Yin dominant ratio once more. The user can manipulate the dark substance with high speed, but that is according to the skill of the user. Some can't move it an inch, others can move it with very high speed. The target that is trapped in this technique begins to lose strength, stamina and life. To become as Nagato was when he used up all of his chakra to bring Konoha shinobi that were killed back to life. Meaning that the target seems like he's aging to the point of death. Again, the speed of this process depends on the user.
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