Chainsaw Man has thrown yet another curveball that has the potential to change the trajectory of the story. The carnage was immediate, the stakes impossibly high, and yet, by the end of it, the War Devil Yoru stood tall. Her skull was skewered; therefore, it should not have been possible for her to make it out alive.
The answer, once you put the pieces together, is actually quite obvious. Nuclear weapons are back—and with them, so is War. The chapter opens with Falling Devil unleashing a hellstorm of spears and blades. In what looks like a brutal execution, Denji, the homeowner, and Yoru are each impaled directly through the head.
Falling Devil even remarks that she didn’t go all out. This implies that these deaths were almost casual. She doubts herself for a moment, even questions whether the War Devil is really as terrifying as legends say. And in that quiet moment of gloating, Yoru pulls off the biggest surprise of the arc.
Yoru appears behind the Falling Devil and, without wasting any time, she uses the same spear that just skewered her skull and drives it through the Falling Devil’s chest. For most of Part 2 of Chainsaw Man, Yoru has been a shadow of her former self.

Although she’s struggled with other devils, relied on Asa to create weapons, and never once lived up to her name as one of the Four Horsemen, that all changed in Chapter 209. Chapter 209 flipped the script completely. This wasn’t just Yoru getting a lucky break.
This was War awakening. Her casual dismemberment of Falling, her almost instinctual dodges and counterattacks, the sheer rawness of her fists exploding a primal fear’s torso, this is power we haven’t seen from her before. Even she seems stunned. She begins to cry. It is not because she is emotional, but rather because she remembered something important.
In the final pages of the chapter, the answer hits us as hard as it hit Yoru. The TV announces breaking news: the war between the United States and the Soviet Union has escalated. In a last-ditch effort, the U.S. has dropped a new weapon, one powered by uranium or plutonium, on several Soviet cities.
It is a bomb, and Yoru instantly recognizes it as a nuclear weapon. This isn’t just a global catastrophe. It’s a metaphysical event. Because in the Chainsaw Man universe, devils are born from fear. The greater the fear, the stronger the devil.
Once upon a time, Pochita ate the Nuclear Weapons Devil. That fear and its power were erased. But humanity seems to have a nasty habit of rediscovering its worst ideas. They brought nukes back. And in doing so, they reignited the fear that fuels the War Devil.
Why was the timing perfect in Chainsaw Man?

This explosion of strength didn’t come out of nowhere. Yoru in Chainsaw Man didn’t magically level up. Her brutal resurrection came through the moment nukes were dropped. The war effort itself is the largest-scale violence humans can imagine, and that is exactly what resurrected Yoru. It’s the moment war becomes real again, beyond skirmishes and proxy conflicts. The moment humanity fears complete annihilation.
It is the perfect storm for Yoru to thrive. And it’s no coincidence she even starts remembering things she had forgotten. That could imply that some of her memories or power were tied to the Nuclear Weapons Devil’s existence. Now that that concept has returned, her memories and her might have rushed back in a flood.
Final thoughts

Chapter 209 wasn’t just a great Chainsaw Man chapter. It was a historic one. Fujimoto took a long-forgotten devil concept, erased by Pochita, and brought it screaming back into relevance with brutal clarity. Yoru’s survival wasn’t luck. It wasn’t a trick. It was inevitable.
Because as long as humanity fears war and now fears nukes again, Yoru will never truly die. She is conflict incarnate. And with the world’s deadliest weapon reborn, the War Devil has finally remembered what she is: A god of carnage. And from here on out, Chainsaw Man is no longer just about devils. It’s about nations, politics, weapons of mass destruction, and maybe the end of peace.