Senjutsu (Literally meaning: Sage Techniques) is a specialised field of techniques that allows the user to sense and then gather natural energy. Senjutsu practitioners learn to draw the energy of nature inside of them, blending it with their own chakra. This adds a new dimension of power to the practitioner's chakra, resulting in the creation of "senjutsu chakra". Senjutsu is uniquely invulnerable to Truthseeker Orbs.
Those that can absorb or manipulate senjutsu chakra are known as sages. Generally, senjutsu chakra cannot be used by those untrained in senjutsu; those who are enter a form called Sage Mode, increasing their physical parameters for as long as the mode is active. Because of the steep prerequisites of Sage Mode and the risks involved just in learning how to use it, there are other methods: