Zero.

Summary

A massive zombie siege is occurring around Earth City, with estimates suggesting over a billion zombies. Zero, capable of fighting them, believes the actual number could exceed a hundred billion, especially considering the underground population. As a fleet from outer space bombards the horde, a powerful zombie retaliates, destroying warships. Meanwhile, an archer with exceptional skill kills a zombie leader, causing chaos among the horde. Zero then intervenes, using earth magic to immobilize zombies and transforming into a lava giant dragon, incinerating many. He confronts Houtu City, revealing the futility of their efforts against the zombies and demanding a solution.

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