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Another ability of the Uncanny Sword, Masamune is able to utilize and manipulate the shadows of the individual in which he possess offensively or defensively.

Soul Possession (魂憑依, Tamashī Hyōi): One of the abilities under the Uncanny Sword is the ability to possess a person's soul. According to Franken Stein and Tsubaki, the Uncanny Sword exploits the fear within someone's heart to possess the body and soul of it's victims. After an amount of time, the victim's souls are eaten. [2]

Other Skills & AbilitiesEdit

Masamune Nakatsukasa - (17)

Masamune showcasing his skill with a sword.

Adept Swordsman: Masamune is incredibly skilled with a sword even when possessing his targets, being skilled enough to hold his own with Black☆Star using the Demon Shadow Weapon in the Ninja Sword mode when in Ryoku's body during the early session of the series.[2] When facing his sister within the Uncanny Sword's world, he was the far more competent and superior opponent, easily blocking and countered her attacks and stated had they been in the real world, such attacks would have killed her.[3]

Immense Power: Masamune was considered a dangerous opponent by Franken Stein, even doubting If Tsubaki had the ability to face him and was willing to actively disobey Death to fight him in place of her.[6] According to Death, he was on his way to becoming a Kishin himself.[7]

WeaknessesEdit

According to Tsubaki Nakatsukasa, even the Uncanny Sword is unable to control two Soul Wavelengths at the same time. Attacks such as Soul Menace, in which shoots the Wavelength, is highly efficient and will repel and detach the Soul Possession away from the victim.[2]

TechniquesEdit

Shadow Puppet - (11)

Tsubaki being held by three Shadow Puppets under Masamune's control.

Shadow Manipulation Techniques

Puppet Shadow (傀儡影, Kugutsu Kage): Masamune controls the shadow of the person he has possessed for pincer attacks. The puppet can only say "shadow".

Puppet Thrust (傀儡突き, Kugutsuzuki): By folding the Shadow Puppet around the blade, Masamune can increase the range of a lunge thrust.

Split Branches (枝分かれ, Edawakare): After the Puppet Strike, large spikes come out from the shadow's body to skewer the enemy at close range.

Puppet's Rain (傀儡雨, Kugutsudare): By using multiple Shadow Puppets to restrain his enemy, Masamune stabs his enemy.