The Queen Ormhildr's Cup is a quest item in Divinity II: Flames of Vengeance.
This artifact has placed a curse on a goblin named Najaad, turning her into a troll with an insatiable thirst. After completing the quest Bartender and unlocking her cell at Wild Willows Manor, she offers the quest The Blighted Beaker to find the cup and return it to rightful place on a pedestal at Gula's Archaeological Dig to remove the curse.
Queen Ormhildr's Cup is found in the Medicine Room at the Wild Willows Manor, behind a concealed wall that is lifted after pulling a lever revealed by mindreading the patient Bedlam for 15000 exp.
Cup at Wild Willows Manor
Cup returned to altar at Gula's Archaeological Dig