The chain bursts into blinding white flame. It vaporizes in moments and all that is left is a criss-cross of burns on the Wyvern corpse. The stick catches fire.

Spoiler: Identify
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While the precise item is unfamiliar to Sil, she is able to determine that the chain was definitely the method used to control the Wyvern. She suspects it would need to be linked to some item on the Lizardfolk - though that may be similarly booby-trapped.