Zero.

Summary

In the narrative, Zero discovers that three years after leaving Borison City, the Corpse Emperor was killed, leading to a retreat of zombies underground. The three major cities sealed off most underground passages, relying on Martial Saints to manage the remaining entrances. Beneath Tu Xing, 18 layers of zombies exist, with ordinary people capable of defeating them with training. Meanwhile, the interstellar realm faces turmoil as robots and zombies unite, prompting the Alliance of Stars to target Pluto, which possesses immense destructive power. Mercury and Mars develop satellite fortresses, but Pluto proves to be a formidable weapon itself. Long Ao Tian emerges as a powerful defender against Pluto's attacks, leading to a shift in strategy towards ground assaults. Tu Xing becomes a training ground for the Star Alliance, with new cities emerging around the underground zombie hordes, marking significant changes over three years.

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