Complete Body — Susanoo

Complete Body — Susanoo is the final form of Susanoo and the ultimate ability of the Mangekyō Sharingan. It can only be accessed when the wielder stabilises their construct's chakra.

Appearance
Complete Body — Susanoo have several common features. These include, but are not limited to, reaching a size that dwarfs the landscape, comparable in size to a mountain, a tengu mask with a jewel at the top of the forehead, samurai-esque armor, and a second pair of arms attached to the back. These arms can also sometimes function as wings that are capable of flight. Complete Body — Susanoo also possess gigantic versions of the various chakra weapons wielded by Susanoo, with chakra katanas being the most common weapon.

However, akin to how each set of Mangekyō have differing designs, all Complete Body — Susanoo have certain unique features (such as the design of the mask) which reflect the user's chakra and features.

Usage
The Complete Body — Susanoo is a powerful technique, comparable in power to a Tailed Beast; it is capable of cutting entire mountains with a single sword swipe. It is also versatile as some have the ability to fly. When Sasuke was enhanced by Six Paths Chakra, he could destroy multiple Chibaku Tensei created by the jinchūriki of the Ten-Tails, Madara. Despite its power, users can hold people comfortably within its hand. Much like with the other forms of Susanoo, users are also able to manifest singular parts of Complete Body — Susanoo.

As the final form of Susanoo, Complete Body — Susanoo can withstand tremendous amounts of damage. Only the strongest techniques, such as Top Transformed Buddha, Eighty Gods Vacuum Attack, or Six Paths Chakra enhanced Tailed Beast Balls have been capable of damaging or destroying it. Rinnegan users are also capable of using it to shield themselves from the light of the Infinite Tsukuyomi.

Tailed Beast Containment
As demonstrated by Sasuke Uchiha, Complete Body — Susanoo can be used to contain the chakra of all nine Tailed Beasts, with Yin-Kurama likening it to the Demonic Statue of the Outer Path. Complete Body — Susanoo gains powerful new weapons in this form, such as Lightning Release senbon that could counter Tailed Beast Balls, as well as Sasuke's strongest technique, Indra's Arrow. With it, he proved capable of overwhelming Naruto Uzumaki's Six Paths-enhanced Tailed Beast Mode. It was only after receiving vast amounts of Natural Energy from Kurama that Naruto was able to match Sasuke.

Trivia

 * Although Madara, Indra, Sasuke and Kakashi all were shown manifesting a stabilised Susanoo in the manga, only Madara is listed as a user of the Complete Body — Susanoo in the fourth databook.
 * While the exact requirements of this are unknown, all manga users have achieved either the Eternal Mangekyō Sharingan or Six Paths Chakra.
 * For Naruto Shippūden: Ultimate Ninja Storm 4, Masashi Kishimoto designed Complete Body — Susanoo's for Itachi and Shisui Uchiha, which were playable in game. Despite this, the forms aren't canon to the manga.