The Helm of the Serpent is the primary heirloom of House Casanaros. The helmet is comprised entirely of bone, said to be from a monster defeated by Frenkor Casanaros, the legendary founder of House Casanaros. However, the faceplate of the helmet seems to be a Human skull, through the skull is fused with the non-human bones, adding to confusion regarding the helm's origin. In the coronation of a lord of House Casanaros, the new lord is crowned with the helmet.