The player is then tasked with retrieving the Bloodstone Chalice, a powerful artifact intended to aid Harkon's cause, to fill it with water from Redwater Den, and then to add the blood of a powerful vampire. While retrieving the Chalice, the player character is attacked by two of the Volkihar, Stalf and Salonia, who are plotting to overthrow Harkon under orders from Vingalmo and Orthjolf, Harkon's top advisers. After killing them, the player adds their blood to the Chalice and returns to Castle Volkihar.