Gojo’s comment, however ... making him one of the series' most intriguing unseen figures. Given that the Heian era was the so-called "Golden Age of Sorcery," a Jujutsu Kaisen prequel solely ...

but it is worth pointing out that the King of Curses was massively injured after the Gojo fight. This resulted in him unleashing his Heian era form and recovering right from the get-go ...