Combined observation: Xenia is harming the mouthpiece is a combined memory created in JasKra's chamber during Heart of Stone by combining Observation: ERROR and Observation: Theft. It serves no purpose, and may be separated to retrieve the original memories.
Looking over the combined visions, you believe that Xenia is damaging the mouthpiece by siphoning energy off it. It's a fairly tenuous link, though, motived more by gut instinct than evidence.
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