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

Summary

In a high-stakes confrontation at a casino, a group battles an Indian old woman who appears to be a powerful demon goddess. The battle involves mystical weapons like short swords and a black orb, with various characters attempting to defeat her. Yang Xiao and Yang Jun coordinate attacks, using tactics like a copper nail explosion to create a vulnerability. The protagonist manages to strike the goddess with a short sword, but is subsequently grabbed by her and nearly strangled. The battle culminates in Yang Jun being fatally struck by a black orb after attempting to attack the goddess from behind.

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