The Night of the Red Knives was an ambush that took place at Daggerfell Keep, resulting in the murder of Silas Tunston and his vassals. This allowed Furion Whitacre to become the next King of Elyria.
After the Tunston Uprising ended in 1036/6, Elyrian rebels captured Erôn-Kelerath and prepared to coronate Duke Silas Tunston of Grüenwald as their new king.
However, rival nobles led by Duke Furion Whitacre planned a bloody ambush within the castle on the night of the victory feast. After dinner, the guests went to bed. Later that evening, Silas, his entire family, and all his vassals, were butchered within the castle walls.
After the massacre, Furion proclaimed himself the new king of Elyria. Because of this massacre, the castle is said to be haunted to this very day and is called "Daggerfell Keep." The castle later mysteriously burned and has never been rebuilt.
Most local folks say Lord Silas should have stayed the night at the nearby Green Gryffon Inn; Elyrian history might have been very different.