Chapter 209: Terrifying Weapon

A polearm punches through Yoru's skull while a blocky claymore-style weapon tears into her hips; Denji is run through by a sword and a nearby bystander takes a lethal wound to the neck. Mocking them, Falling Devil claims she has been holding back and that the War Devil amounts to nothing, reminiscing about how dreadful she herself once was. Yoru abruptly disappears, then materializes at the Primal Fear's back and drives a blade through her, though Falling Devil answers with a blast fired behind herself. Insisting she should already be dead, Yoru instead guts her opponent with a sword.

Weeping, Yoru asks aloud why something so vital slipped her mind and why it is only now returning to her, then carves the regenerating enemy into pieces so fine that her torso simply ends. Her foe beaten at last, she drifts toward Denji and catches sight of a breaking report. The fallout of everything, the anchor explains, has ignited total war, setting America against the Soviets as the former unleashes an old anti-Devil weapon on several of its rival's cities. A note passed to the newsreader adds that the arm was sent in to hasten the war's end and that atomic power drives it. The truth lands hard: people have reinvented the nuclear bomb.

Yoru, Denji, and a bystander are gravely impaled, but Yoru vanishes and reappears to stab Falling Devil, then dices the regenerating Primal Fear until her torso is gone. A bulletin reports that recent chaos has triggered open war, with the United States striking Soviet cities using a repurposed anti-Devil arm powered by atomic energy. Yoru grasps in horror that mankind has rebuilt nuclear weapons.

Published in Volume 22 as Osoroshī Heiki, the chapter closes Falling Devil's fight and pivots the story toward a wider catastrophe. The atomic strike marks the debut mention of the Nuclear Weapons Devil. The cast covers Yoru, Denji, Falling Devil, and the Nuclear Weapons Devil.