Construction

One object. One lifetime. That's the deal. Construction lets the user build a single real, permanent, physical object from cursed energy, but creating it burns every drop of cursed energy the user has. The act of making something is the act of dying.

Most techniques produce temporary constructs that dissolve when the energy fades. Construction creates something that lasts forever, as real and solid as if it had been forged in a workshop. The permanence comes at the ultimate price.

Mai ZeninMai ZeninGrade 3 · HumanMaki's twin, kept inside the Zenin family while Maki left, and resentful of her sister for going. Her technique makes objects out of nothing at a steep price, and the last thing sh... lived with this technique as a burden. She could make small things, bullets, mostly, without triggering the lethal full activation. But she always knew what the technique was really for, and what it would cost.

When Ogi ZeninOgi ZeninSpecial Grade 1 · HumanA Zenin clan elder who attempted to execute his own daughters, Mai and Maki, inside the clan's cursed warehouse. His Blazing Courage technique wrapped his blade in intense flames. ... tried to burn his daughters alive, Mai made her choice. She poured everything, every last particle of cursed energy in her body, into creating a sword for Maki. She died in her sister's arms, and in the same moment, the twin bond that had been limiting Maki's Heavenly Restriction shattered completely. Maki's body perfected itself into something comparable to Toji FushiguroToji FushiguroHumanThe Sorcerer Killer. Born into the Zenin clan with a Heavenly Restriction that traded every drop of cursed energy for a perfected physical body. Toji couldn't see curses, couldn't ...: zero cursed energy, superhuman physical ability.

The sword Mai made became Maki's primary weapon. She used it to kill Ogi, then to destroy most of the Zenin clan. Every life that sword took started with the one life it cost.

YorozuYorozuHumanAn ancient sorcerer from Sukuna's era who was incarnated during the Culling Game. She possessed Construction: the same technique as Mai Zenin, and used it far more proficiently, ra..., a sorcerer from Sukuna'sSukunaSpecial Grade · HumanThe King of Curses. A thousand years ago, Sukuna was a jujutsu sorcerer so powerful that other sorcerers of the golden age couldn't defeat him even working together. His cursed tec... era, also had Construction but used it differently, rapidly creating weapons and armor in combat without paying the full price, suggesting mastery can unlock intermediate uses between 'make a bullet' and 'make something and die.'

Construction's domain expansion, Threefold AfflictionThreefold AfflictionDomain ExpansionYorozu's domain maximizes her Construction technique, allowing her to generate objects and weapons instantaneously in unlimited quantities. Within the enclosed space, everything Yo..., takes the form of an empty space with several oversized, organic structures floating within it that resemble the disembodied brains and ventral nerve cords of insects. The sure-hit effect of the domain applies to the user's constructed items.