After confronting the skeletons in his closet firsthand, Endeavor launched an attack again. It's his responsibility to stop All For One, but protecting Hawks, Jiro, and Fumikage cost him a limb. Despite the injury, Number One's blood My Hero Academy seething with anger.
Endeavor's right arm was severed by Symbol of Fear's attack, but as we see in My Hero Academia 357, there's nothing more dangerous than a wounded hero. By controlling his flames, Number One actually manages to make up for the deficiency by forming a arm of fire.
With the help of Hawks, Endeavor manages to hit All For One with a Jet Burn. The fight moves from heaven to earth, with the Flame Hero who unleashes a real hell. Unable to control his body without his helmet, the Symbol of Fear makes a last-ditch effort to steal the hero's Quirk. However, effort burns so intensely that the antagonist's hand is charred. Here's the number one rage in full color fanart from My Hero Academia.
After envisioning his son Shoto's future, Endeavor decides to end everything. Confident that All For One doesn't have a regen quirk, he squeezes it in a vise, setting it ablaze. The symbol of fear is dead, or at least Endeavor thinks so.
Hawks, orders his partner to flee immediately. All For One is still alive and well: even the bad guys are even more dangerous when they're hurt. In between endless loopholes of All For One, there is the plan of Overhaul. Somehow he used the power of Eri to regenerate his body. An eye and a mouth appear on his face.