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The black wooden box was filled with a highly dense, soft substance known as Oak Mucus,
harvested from the oak cultivation areas within Zion, artificially infected to contract a controllable tree disease.
After infection, the oaks would produce tumorous tissues, periodically secreting a sealing, malleable, and controllable mucus; the initial mucus appeared light grey, with a translucency of 30–40%.
It could be diluted or refined to create Oak Mucus for various uses.
Often used to encase infectious materials, it could effectively prevent the spread of the Pathological Characteristic while catering to both "storage" and "sealing" effects.
At the moment,
within the concentrated and refined mucus, lay a special firearm, primarily black with silver decorations.
Due to its "handgun-like grip" and "no stock" configuration, Yi Chen mistook it for a handgun at first glance,
only upon closer inspection did he realize it was a portable shotgun designed with a shortened barrel,
