Shinobi Sect: Sage Art: Spirit Thief

Through Seireitou's Ninshū, once subjugating natural energy to his whim, it becomes possible to further his influence onto his opponents. It is possible for Seireitou to actually connect with an opponent's spiritual energy, a teaching that is present in Hagoromo's original Ninshū, but solely for the purpose of stealing energy from them. It becomes possible to rob them of their chakra, whether it be their own or even the chakra of a tailed beast within them, and actually turn it into his own power. Similar to the various genjutsu cast by Sharingan, all it takes for this technique to work is for a person to gaze into the eyes of Seireitou's Byakugan for the connection to be made.