2. What killed the two birds inside the house?

To my knowledge , there is a kind of spell in Taoist or so called "Mao Shan Shu" where one could summon spirits to possess in objects or living beings (including animals).
When the ritual is succeeded , the summoner could order the possessed birds to spy or gather information. After the complete ritual, the possessed birds will meet its end. - Xiao Ji (Your faithful SPI club member)


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