Prince Villynaty is a sahuagin located in the City of Caverns in Shadows of Amn campaign. King Ixilthetocal, who the party speaks to upon their entrance to the City of Caverns, wants the Prince killed for rebellion; however, a priestess wants the party to save the prince to preserve stronger sahuagin and rebuild their community. Villynaty can be either killed or allied with. If the latter option is picked he will give the party a fake heart to return to the king. Battle against the king and his retainers ensues, and Villynaty and the priestess thank the party and allow the plot to progress, into the Underdark.