Introduction to Yuki Tsukumo: The Special Grade Sorcerer
In the world of Jujutsu Kaisen (JJK), the title of Special Grade is reserved for sorcerers with the power to single-handedly overthrow a nation. Yuki Tsukumo is one of only four sorcerers to ever hold this distinction, yet she remains one of the most enigmatic figures in the series. Unlike Satoru Gojo or Suguru Geto, Yuki chose a path of independence, refusing to take on missions from the Jujutsu High authorities. Her philosophy centers on a world without cursed energy, aiming to cure the root cause of curses rather than simply exorcising them. Despite her philosophical leanings, Yuki Tsukumo is a powerhouse on the battlefield, possessing a mastery of cursed energy and a physical combat style that is bolstered by her devastating innate technique, Star Rage.
Understanding the Star Rage Technique (Bom-Ba-Ye)
Yuki Tsukumo’s primary cursed technique is known as Star Rage, also referred to as "Bom-Ba-Ye." This technique allows Yuki to grant herself "virtual mass." By manipulating her cursed energy, she can make herself effectively as heavy as a celestial body without actually increasing her physical size or density. This virtual mass does not affect her speed or agility, allowing her to move with the grace of a lightweight fighter while delivering blows with the force of an unstoppable mountain. Because this mass is virtual rather than real, Yuki is not affected by the laws of physics that would normally hinder a high-mass object, such as increased gravity or momentum-based sluggishness. When Yuki activates Star Rage, her physical attacks become so powerful that they can shatter even the most advanced barrier techniques and specialized cursed spirits with a single punch.
The Role of Garuda: Yuki’s Unique Shikigami
Yuki is rarely seen without her constant companion, Garuda. Garuda is a unique Shikigami that has been turned into a cursed tool. What makes this Shikigami truly terrifying is that it is the only entity other than Yuki herself that can be affected by the Star Rage technique. By imbuing Garuda with virtual mass, Yuki can transform the Shikigami into a devastating projectile or a whip-like weapon with infinite crushing power. Garuda serves as both a tactical tool and an extension of Yuki's own body. During combat, she often uses Garuda to restrain opponents or to clear large areas of enemies. The synergy between Yuki Tsukumo and Garuda highlights her mastery over her technique, as she can fluidly switch the application of virtual mass between herself and her Shikigami to keep her opponents off-balance.
Tactical Analysis: Yuki Tsukumo vs. Kenjaku

The true extent of Yuki's power was showcased during the high-stakes battle of Kenjaku vs Yuki. Facing off against the ancient sorcerer in the Sunken Temple, Yuki demonstrated the raw lethality of Star Rage. Kenjaku, known for his vast array of cursed techniques and strategic brilliance, was visibly shaken by the sheer weight of Yuki's attacks. During the Kenjaku vs Yuki fight, Yuki was able to punch through Kenjaku's reinforced arms and shatter his cursed spirits with minimal effort. This battle also revealed the conceptual nature of Star Rage; because her mass is virtual and essentially "infinite" in a conceptual sense, she is immune to techniques that target the target's physical composition or definitions. Despite the eventual tragic outcome, Yuki's performance against one of the series' primary antagonists proved why she was feared as a Special Grade sorcerer.
Secrets and Limitations of the Star Rage Power
While Star Rage is arguably one of the strongest offensive techniques in Jujutsu Kaisen, it is not without its limitations. Some of the key aspects of its power include:
- Conceptual Immunity: Because Yuki adds mass to herself conceptually, techniques that rely on "logic" or "rules" regarding the target's weight often fail to work on her.
- Output Limits: While the mass is virtual, the cursed energy required to maintain it is substantial. Extensive use of the technique can lead to fatigue.
- Self-Damage: Although the mass is virtual, the impact of her own strikes on her body can be taxing if she is not properly reinforcing her limbs with cursed energy.
- The Black Hole: The ultimate secret of Star Rage is that if Yuki removes all limits on the virtual mass, she can effectively turn herself into a black hole. This is a suicide move that can destroy the entire world, which is why she only considers it as a final, desperate resort.
Conclusion: The Legacy of Yuki Tsukumo in JJK
Yuki Tsukumo’s legacy in JJK is defined by her dual nature as a scholar and a warrior. Her Star Rage technique is a perfect metaphor for her character: a weight that the world cannot ignore, wielded by someone who wishes the world didn't have to carry such burdens. Through her research into the soul and her fierce combat against Kenjaku, she paved the way for the next generation of sorcerers like Yuji Itadori and Maki Zenin. Even in her absence, the impact of her philosophy and the sheer power of her Special Grade status continue to resonate. Yuki remains a fan-favorite character whose depth, strength, and unique Shikigami, Garuda, make her one of the most memorable figures in the history of Jujutsu Kaisen.