Six Paths Sage Mode (TTF)

A special type of senjutsu granted by being able to use the chakra of Hagoromo Ōtsutsuki; the Sage of the Six Paths.

Overview
The Senjutsu of the Six Paths refers to the ability of a shinobi to preform senjutsu in tandem with the chakra of Hagoromo — usually by the transmigrants of his two sons, and. The resulting transformation, then, brings its user close to the exact likeness of that of the Sage of the Six Paths. Doing so explosively increases the user's strength, speed, and durability as well as allowing them to preform highly taxing techniques and create the Truth-Seeking Balls.

Advantages
The advantages afforded to those who learn Sage Transformation include:
 * The user's physical strength, speed, stamina, reflexes, perception and durability dramatically increase.
 * The user's ninjutsu, genjutsu, and taijutsu become substantially more powerful — even more so than in one of the parent techniques.
 * Like with Sage Mode, the user can manipulate the natural energy that surrounds them in this mode, turning it into an extension of their body, which increases the reach of their attacks.
 * The user gains the ability to sense chakra around them.
 * The user gains access to the abilities of his or her tailed beast (if they are a jinchūriki).
 * The user can use the Truth-Seeking Balls.

Disadvantages
This form is not without its risks. These disadvantages include:
 * The user loses the ability to use certain space-time ninjutsu.
 * If the user draws in too much natural energy, they run the risk of transforming into a into stone. If the petrification is completed, it cannot be reversed.

Imperfect Transformation
Obito Uchiha was unable to obtain a perfect usage due to being unable to perfectly balance the Shinju's natural energy and tailed beast chakra along with his own. As a result, his body underwent two grotesque transformations which altered his body into a similar appearance to the perfect Sage Transformation. Even after gaining complete control of the Ten-Tails, he was unable to find a perfect balance, leading to his form being weaker than others.

Despite his imperfect transformation, he was still capable of using the Ten-Tail's abilities well enough to fight the entire Shinobi Alliance and enter his own Tailed Beast Mode. He, however, lacked the ability to use senjutsu, though this may be because he never truly learned Sage Mode.

Perfect Transformation
Unlike Obito, Madara Uchiha, Naruto Uzumaki, and Ryun Uchiha were able to perfectly balance the four way chakra required by this mode. This allows them to use Sage Transformation in its purest form. The resulting transformation brings their physical form to being almost exactly identical to that of Hagoromo Ōtsutsuki — the Sage of the Six Paths. All three gain haori made out of their respective tailed beast's chakra, adorned with magatama much like the Sage himself.

All three are capable of entering Tailed Beast Mode in this form, however, unlike Obito, all three are also capable of using some manner of senjutsu. Despite this, of the three, only Madara did not naturally come by his senjutsu chakra — having to steal Hashirama Senju's senjutsu chakra and combine it with Hashirama's implants on his body in order to replicate the legendary Senju's Sage Mode.

Trivia

 * This transformation is not to be confused with the Sage Transformation used by and his clan. The name for this form comes from the name Madara Uchiha gave it when Obito used it, likely referring to the likeness it grants one to the Sage of the Six Paths.