Throughout the story of Jujutsu Kaisen, one arc remains the main fan favorite for most audiences: the Shibuya Incident arc.
The Shibuya arc is home to several heavy contenders for ... especially in the battle between the reanimated Toji and Dagon. The reason for dimming anime for broadcast is to prevent seizures.
There have been several emotional fight scenes in Jujutsu Kaisen, with these examples being the most hard-hitting.