Myusim

Myusim (기분, No-Mindedness) is a mental state of mind that highly-trained Shinobi are capable of accessing during combat. It literally "sets them in a new plain of being", in the words of Sōsuke Nakahara. While under this state of mentality, no technique is said to be able to "influence" or "affect" them. While the process of undergoing this mental state is unknown, it was said that it would come to one who truly wished to bring change to the world, and one who could be open to understanding. It is unknown if anyone truly is able to use this mental state of mind, as the Sage of Six Paths was noted to be its only master. Sydonay Uzumaki also said that this technique existed prior to the Sage's era. In his own words, "in the era before the sage, we manipulated, not the energy within us, but the limitless capacity that our minds possess."