A Dance with Rogues
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This is a drink the Princess is offered in the Cult Site during Jachan Coin quest, prior her going into lower levels of the temple. The Princess doesn't have to drink it to poceed.

Spoiler: The drink is a powerfull aphrodisiac. If the Princess will drink it she will not be able to choose other dialog options when talking to the Highpriest but rude ones, and will be the focus of the ritual. The drink also enhances the Princess's sexual poweres making it easier for her to satisfy the Karmanthi.
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