According to
Sasuke Uchiha, if a Sharingan user unlocks two Mangekyō Sharingan powers, one in each eye, known as the "Double Mangekyō" (ダブル万華鏡,
Daburu Mangekyō), it gives access to the third power, Susanoo.
[2] Nevertheless, for a
Sharingan user to activate Susanoo, according to
Obito Uchiha, is a rarity.
[3] Since it is formed through the materialisation of the user's
chakra, its abilities, appearance and colour vary among individuals. The user is able to freely move around within Susanoo's body as well as levitate inside of it,
[4] and can also leave its body entirely while maintaining it.
[5] It is also possible for others to enter Susanoo when allowed by the user.
[6] While Susanoo acts as a defence against external attacks, anything coming out of its body will simply phase through it.
[7][8] Susanoo can also be easily reformed in the event it is oblierated by a powerful attack, provided it protected the user from being massively injured and they're still physically capable of reforming it.
Several users of this technique have demonstrated the ability to activate and maintain Susanoo without having their Mangekyō Sharingan active,
[9][10][11] or even their regular Sharingan.
[12] Madara was able to use this technique even without having any eyes.
[13]