Senjutsu represents the perfect combination of spiritual, physical, and natural energy within a shinobi's body. It is obtained by a user who has undergone specialized training allowing them to sense and gather the natural energy around them. Once the natural energy mixes with the chakra inside a shinobi's body it undergoes an empowered change called Sage Mode. In Sage Mode, a shinobi's strength and jutsu prowess increases dramatically giving them abilities and power past the bar of a normal ninja. There are a select few who have mastered the technique for gathering natural energy, and those select few are known as Sages.