Gege in extras talks about transformation in 237 chapter: I was going to talk about it in Volume 27, but I didn't have time because I was hospitalized. The method of restoring his body by resuming his transformation through Sukuna's incarnation was necessary to (1/4)

—start Round 2 with the members of the JujuHigh team, but the question arose, “Then what happens?” The answer is “Sukuna didn't just interrupt transformation, when incarnated he rejected it and later it ended”, which would show the difference in skill between Sukuna and — (2/4)