Sukuna is one of the most divisive antagonists of contemporary anime. On the one hand, he is an absolute threat, endearing to the extent of his villainy, as well as his influence on Gege Akutami's world. Jujutsu Kaisen. As a shonen antagonist, Tsukuna resides in fundamentally uncharted territory, as it is often seen that even when jujutsu wizards of justice try to thwart his plans to lead the world into another dark age of blood and magic, he will almost always prevail. Tsukuna had more abilities and more experience than anyone who tried to oppose him, making him seem almost unbeatable at times, especially after the body-swap incident.
However, Tsukuna's own elemental abilities were already enough to support her as one of the most powerful characters in the Jujutsu Kaisen universe. So, what are Sukuna's strongest innate techniques?

Jujutsu Kaisen: Bad… Kitchen?
Crunchyroll's explanation of what Sukuna's domain expansion was cooking when he translated it to “Malevolent Kitchen”.
Wait, what is innate technology?
Jujutsu magicians use “cursed techniques” in combat. For many, these techniques emerge at an early age and are present from birth. They are directly connected to the person and do not exist outside of them. As such, inherent technologies cannot be copied or stolen. This is why both Kenzaku and Sukuna resort to body-snapping to gain access to special cursed techniques, as those techniques were actually innate techniques.
In the case of both the Zen'in and Gojō lineages, these techniques are revealed every few generations and are directly linked to their respective lineages rather than within a single individual. These techniques, the Gozo Clan's Unlimited and Six Eyes and the Genin's Ten Shadow Technique, are the most powerful. Jujutsu Kaisen The universe, and each other is a strong counter.
In the past, only the wielder of the Ten Shadow Technique, along with the Six Eyes and Limitless Techniques, could excel in combat. That's why, throughout Jujutsu KaisenIt's constantly hinted that Megumi is the only character who can actually beat Gozo in a fight, and how this is done is by constantly using her as a barometer of Gozo in her battles – she often uses the argument that her next opponent isn't Gozo, and therefore deserves to be defeated, not realizing that this is the only reason she's seen with Tech. On the level of Gojō's Six Eyes and Limitless combination.
However, examples of innate techniques include Yuta Okkotsu's copy; passive conversion of fame; Nobara Kugisaki's Straw Doll Technique (correctly identified by Mahito as a ridiculously dangerous ability for how it affects spirits, causing him to kill her), among others. Sukuna's innate technique, Shrine (or “Kitchen”, depending on your persuasion), has two main modes: Cleave and Dismantle.
Cleave
Cutting techniques such as Dismantle, Cleave are applied against powerful opponents and react proportionally to the Cursed Energy poured into it, as well as the Cursed Energy of the target, adjusting its effectiveness accordingly. Unlike dissolution; However, Cleave requires contact with the opponent. It is one of Tsukuna's most devastating abilities and was used to kill Ishigori, the most powerful mage in the Culling Games, at least when it comes to maximum Cursed Energy output.
Spiderweb
Cleave, when applied to inorganic, spreads outward like a spider-web, cutting the object in threads of web depending on the hardness of the object (since objects do not have cursed energy).
Divine Flame
Divine Flame can only be used after both Dismantle and Cleave have been used. By using the Binding Wave, Tsukuna overcomes the technique's short range and lack of speed, making her unreachable when fighting multiple opponents except when fighting within her domain. Remember, Domain Expansion is a powerful technique because it effects an area in space where the caster's Curse technique is guaranteed to hit, meaning that Sukuna's Malevolent Shrine (or Kitchen) is an area where inanimate objects are hit with Dismantle, and living with Cursed Energy are hit with Flativation conditions.
At this point, Sukuna's domain becomes a region where everything inside is continuously cut and broken up to the point of pulverization, and then those pulverized particles are struck with thermobaric explosions – resulting in the ignition of oxygen (or any kind of gas cloud) without the need for a catalyzed reaction. “Gas” in this case is the particles that were torn apart by dismantling and cleaving. This technique is so powerful that it became the trump card with which Sukuna managed to defeat the Maharaja. The flames not only create explosions, but they trigger intense pressure and shock waves that destroy everything within the domain. This is Sukuna's most powerful attack on paper, but in various contexts, it can potentially be countered, especially by someone like Satoru Gojo.
break down
Dismantle is the default offensive move that allows Sukuna to unleash invisible slashes that cut the opponent. The ability can be directed with hands, or without them, and can be used against inanimate objects, curses, and of course, people. The scary thing about Dismantle is the way Sukuna can use it in a variety of ways, both offensively and defensively. Slashing doesn't have to be a broad stroke; It can also be several mini slashes around an organ and make the appendage look like a kind of chainsaw. This application allows Sukuna to hand-handle his opponent's weapons and attacks without injury, not to mention that it can be used in tandem with hand-to-hand combat for more devastating flurries. The strength of the disintegration ability depends on the amount of cursed energy poured into it.
Slash cutting the world
After stealing Megumi's body and deploying Mahoraga against Gozo's Limitless, Tsukuna uses the same adaptation mechanic to vastly improve Dismantle's ability to cut through space, reducing Gozo's Infinity and thus splitting the strongest mage of the modern era. This iteration of Dismantle is known as the “World-cutting Slash”, and it's very devastating because it retains the invisibility of the original technique, and combines it with impossibilities like cutting through space. In Chapter 119 of Jujutsu Kaisen manga, Dismantle is specifically described as a move for slashing objects without cord energy. Due to the fact that the world-cutting slash application of Sukuna's single most powerful innate technique, the strongest mage-ending technique of the modern era, was actually his.
The Ten-Shadow Technique (via Megumi Fushiguro)
Tsukuna's eyes were on Megumi as a terrifying womb, when she and Yuji encountered a special-grade curse at the juvenile detention facility (reinforced by one of Tsukuna's fingers). Megumi survived the situation while Yuji stayed for a while to buy her. However, the special-grade was too powerful for both of them at the time. After Sukuna made light work of the curse, Megumi's problems were compounded as the King of Curses temporarily gained unfettered control over Yuji's body. Outside the facility, Tsukuna accuses Megumi after learning that Megumi has the Ten Shadow Technique, but only after asking the boy why he wanted to escape the special-grade curse. Basically, Sukuna's long game was to take over Megumi's body, and in doing so, gain access to the Ten-Shadow Technique, the cursed technique of one of the three major clans of the jujutsu world. However, this was only because he saw immense potential in Megumi – Tsukuna had no idea about the ultimate use of the Ten-Shadow Technique.
The most notable use of the Ten-Shadows technique is the summoning of the Eight-Handled Sword Divergent Silla Divine General Mahoraga, a shikigami capable of adapting to any and all events, rendering it fundamentally invulnerable in battle. This beast is so powerful that apart from Sukuna, no bearer of the Ten-Shadow Technique could control it. In addition to developing defensive adaptations, Mahoraga can also adapt his attacks, making them more effective the longer he fights the opponent. When Tsukuna learns about Mahoraga when Megumi calls during the Shibuya incident, Tsukuna's interest in Megumi grows even more. It is through his taming of the Mahoraga, and the use of its adaptive abilities in the dismantling that turns it into an attack that ultimately kills Satoru Gojo.