Absolute Serenity

The penultimate state of mental self mastery that all martial artists strive towards. Absolute Serenity is a "technique" obtained through mastery of the Dainichi Nyorai technique. Rasetsu has obtained unquestionable stillness of his heart and emotions and as such, rejects any negative outside influences, such as being "infected" by enemy techniques or that which utilizes dark chakra to manipulate and prey on opponents, thus completely denying it and preventing him from being afflicted by say, the presence of another/tailed beast rage etc.