In a poignant scene, Sir Nighteye passes away, surrounded by All Might, Mirio, and Midoriya. Before dying, he uses his Quirk one last time on Mirio, assuring him that he will become a great hero despite losing his Quirk.
Following the intense battle with Overhaul, the heroes deal with the physical and emotional fallout. Nighteye is rushed to the hospital in critical condition after using the last of his strength to look into Midoriya's future—seeing a "bright" one that defies his earlier grim prediction. Boku no Hero Academia 4th Season Episode 14
While being transported to a villain hospital, Overhaul's convoy is intercepted by the League of Villains. Shigaraki takes his revenge by severing Overhaul's hands, effectively removing his ability to use his Quirk, and stealing the finished Quirk-destroying drugs. In a poignant scene, Sir Nighteye passes away,
Episode 14 of My Hero Academia Season 4, titled , serves as the emotional conclusion to the Shie Hassaikai (Overhaul) Arc and is the 77th overall episode of the series. Episode Summary Nighteye is rushed to the hospital in critical
