Paranormal Investigation Bureau Chronicles: Final Season Series (Complete 7 Volumes).

Summary

Yang Jun and Yang Xiao faced a mysterious old man who suddenly appeared after they separated from their group. In a fierce battle, they attacked him with weapons, but he surprisingly reformed after being injured. Their ally, Sun Pang Zi, provided cover fire, while Hugo used holy water to weaken the old man's powers. Despite their efforts, the old man transformed into a humanoid black smoke that proved resistant to most attacks. Yang Xiao used a talisman to create a ghostly hand that briefly hindered the smoke, but it ultimately reabsorbed the blue smoke. Tensions rose as the black smoke solidified into a red-haired foreigner, who threatened them, speaking in both Latin and Chinese, which left the group in shock and confusion.

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