Sage Mode (Ten Tails)


 * This article pertains specifically to the Sage Mode used by Ryun Uchiha. For the generic technique, see Sage Mode.

Sage Mode is the result of using natural energy along with a ninja's normal chakra in perfect balance to drastically empower a ninja's abilities.

Overview
Senjutsu (仙術; Literally meaning "Sage Techniques") refers to a specialized field of techniques that allows the user to sense and then gather the natural energy (自然エネルギー, shizen enerugī) around a person. Senjutsu practitioners can then learn to draw the energy of nature inside of them blending it with their own chakra (created from spiritual and physical energy within the shinobi), adding a new dimension of power to the sage's chakra, resulting in the creation of "senjutsu chakra" (仙術チャクラ, senjutsu chakura). This chakra cannot be seen by anyone other than those who have been trained in senjutsu.

This new chakra enables the user to enter an empowered state called Sage Mode, which can then drastically increase the strength of all ninjutsu, genjutsu, and taijutsu. A person who is able to use senjutsu is called a sage (仙人, sennin). It would seem that there are only three ways to learn senjutsu. One of them is to study under toads from Mount Myōboku, as Shima, Fukasaku, Jiraiya and Naruto have done. Gamakichi and Gamabunta also seem to be familiar with it. Another way is to study under snakes from the where Kabuto Yakushi learnt it. The is the third place to have knowledge on senjutsu. A prerequisite to being able to use senjutsu is that the user must have a great reservoir of chakra themselves in order to manipulate the natural energy.

Advantages
A form completely unique to Ryun after discovering the secrets of senjutsu from the snakes of Ryūchi Cave. Its advantages are:
 * The user's physical strength, speed, stamina, reflexes, and durability dramatically increase.
 * The user's medical ninjutsu is more refined and dramatically more effective.
 * The user's ability to sense chakra is further argumented.

Disadvantages
There are a few disadvantages while using this mode as well, these include:
 * In order to gather enough natural energy to initiate the transformation into Sage Mode, the user must remain perfectly still. Because of that, the user can be an easy target for an opponent.
 * Medical ninjutsu enhanced by Sage Mode are not fit for healing patients, as they could easily become volatile with the potency of the natural energy.
 * Because the user needs to move during combat, the senjutsu chakra cannot be replenished, which means the user can't stay within this state for extended periods of time.
 * After Sage Mode has ended, the user appears to experience exhaustion.

Forms
When Ryun activates his personal Sage Mode, unlike many of the other variations, his body does not undergo a physical change. Instead, his sclera turn black and his irises become a deep golden yellow. He is still capable of using his Sharingan and Mangekyō Sharingan while using Sage Mode, though they take on a darker pigmentation than they do without the influence of natural energy. The power of his Phoenix Rebirth Technique also increases substantially beyond its prior limitations.