Crystal Core *********

Apocalyptic Zombie Flow + Summoning Guards (Such as Royal Guards, Special Teams)

A post-apocalyptic zombie flow story with a modern background. It starts with the outbreak of zombies (you can also start summoning them before the outbreak). The summoned troops are the known guard troops in ancient or modern times. They develop slowly. There are not many guards in the early stage to enter the apocalypse. They have no superpowers and are purely apocalyptic.