To understand the joke, one must examine the grueling weekly schedule of Jujutsu Kaisen's climax. During the serialized Shinjuku Showdown arc, the primary antagonist, the King of Curses Ryomen Sukuna, faced a relentless gauntlet of modern sorcerers. Every single week brought an identical narrative cadence: a fan-favorite hero unveiled a devastating, logically airtight trap, only for Sukuna to reveal a forgotten counter-ability rooted in the mythological Golden Age of Jujutsu.
Readers reached a collective breaking point when complex mechanics were repeatedly rewritten on the fly. Sukuna evaded death sentences through bizarre legal loopholes, survived devastating domain expansions via improvisational binding vows, and manifested forgotten anti-techniques whenever the corner turned too sharp. The community responded with aggressive, affectionate mockery. Fan translators and forum posters on Reddit’s r/Jujutsufolks began fabricating panels where Sukuna stared blankly at an opponent and declared: "Ah yes, my anti-technique, I haven’t used this since the Heian era."
The parody resonated because it captured genuine structural frustration. Rather than outmaneuvering his rivals through demonstrated tactics, Sukuna relied on a thousand-year-old curriculum that author Gege Akutami could invent in real time without prior foreshadowing. What began as internal manga criticism quickly codified into an immortal community trope.