Xachikyu

The user generates an immense beast cloak of fire that acts as armor for the user. The beast can vary from person to person. In Sidra's case it's a Phoenix. The user can either blast powerful flames at the opponent or attack however the beast allows. Generally the user can fly when using this technique. This technique is said to fuse the powers of susanoo and amaterasu into one. This technique can only be used by those who had the chakra of Indra Otsutsuki. Sidra can use it because she's one of Madara's direct descendants, and Madara was Indra's reincarnation. In some ways Xachikyu is another form of susanoo. Xachikyu is capable of burning through Amaterasu, however Susanoo is able to shield its user from Xachikyu's flames as shown when Sasuke fights Sidra during the Uchiha showdown arc, also having massive chakra around the user can make them withstand an attack, such as a tailed beast cloak. Generally Xachikyu takes up a lot of chakra whenever used and may take some time before the user is able to use a big attack again. Sidra can maintain Xachikyu's regular form for about ten-twenty minutes when she battles Naruto. However due to Sidra's Armadagan she is able to gain more chakra and increase her Xachikyu usage time.

Xachikyu Stream: The user unleashes the flames of Xachikyu through their eyes to attack the opponent, the same way Amaterasu is used.

Xachikyu Searing Flames Dance: The user bursts multiple bombs of Xachikyu fire into the air which rain down on the land.

Xachikyu Meteor: The user causes a massive scorching meteor to strike down from the sky.

Xachikyu Form 1: The user generates only part of their armor. With Sidra it's the phoenix's wings so that she can fly.

Xachikyu Form 2: The user generates only part of their armor, not the full beast. In Sidra's case it's just the body and wings of the phoenix. This form acts like a shield to burn down any attack that is launched at her.

Complete Body Xachikyu: The phoenix then turns into a large winged dragon with claws and legs as well as wings. Also a large lance is held in one hand of that dragon. Probably the most powerful of Sidra's arsenal of techniques.