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Shadow Star Zero Form
Technique Data
English Title Shadow☆Star: Zeroth Form - Masamune
Alternate Title(s)
Type Soul Resonance
Derived ability
User(s) Black Star + Tsubaki Nakatsukasa
Class Physical
Real World Data
Manga Debut Chapter 56
Anime Debut N/A

Shadow☆Star: Zeroth Form - Masamune (影☆星・零ノ型「正宗」 Kage☆Boshi: Zero no Kata "Masamune" in Japanese) is one of the various forms within the Shadow☆Star series and is one of the more powerful forms.


The most powerful form of Shadow☆Star, it is initiated after performing a powerful Soul Resonance. Black☆Star's shadow rises up into the air, before diving down towards Black☆Star, wrapping around his neck and transforming into two long scarves of shadow matter. The Uncanny Sword no longer has a black blade, and it reverts to its original form before it began consuming human souls. Tsubaki can make this form lighter than the average katana for Black☆Star to wield, however, Black☆Star wishes for Tsubaki to make it the weight of a normal katana.

The scarf of shadow matter around Black☆Star's neck has a diverse range of uses. It is solid so it can block attacks and even be used to cut through flesh. It also acts like an extra limb, allowing Black☆Star to pull of impossible manoeuvres without losing balance, as well as catapulting him away from danger. In a way, it acts like Medusa's Tail Snake. It is unknown as to who controls the shadow: Black☆Star, Tsubaki, or maybe even both as their minds are in sync whilst using Soul Resonance. This form is only used against the fight against Mifune and the fight against Noah (Greed).




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