Ple-Sen
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I can suggest a fourth option, even worse than the previous ones. Try to continue with diplomacy and invite a trusted person (Dendron?) from Caladium as an observer, under the guise of a mentor or something else. And then this trusted person will slit your throat while no one is watching. They'll hear the Barbarian's cry instead of yours. They'll think, "Well, she's definitely a witch!" and run to tell everyone.