Six Paths Yin Power

The Six Paths Yin Seal is a sealing tattoo that was created by Hagoromo Ōtsutsuki and is part of a powerful sealing technique.

Background
Besides being comprised of the Yin Release nature transformation, the actual applications of the seal aren't clearly understood. What is known, is that it allowed Sasuke Uchiha to bisect Madara Uchiha clean through as the Ten-Tails' Jinchūriki without much effort despite the fact that he was mostly susceptible only to senjutsu-powered attacks and strong physical force.

Trivia

 * As the sealing technique was stated to have been originally used by both Hamura and Hagoromo Ōtsutsuki, it is presumed that Hamura once possessed this seal.
 * It has been noted several times that there is a connection between this technique and the Six Paths Yang Power allowing the users to sense the others chakra even in different dimensions.