A wyvern, a griffin and a hippogriff are the guardians of Dream's castle. The Time-Turner enables Hermione and Harry to rescue Sirius and the hippogriff Buckbeak. Other rides include "Flight of the Hippogriff", a family roller coaster, and the Hogwarts Express. "Flight of the Hippogriff", previously known as "Flying Unicorn", is a Vekoma junior roller coaster. A hippogriff is a legendary creature, supposedly the offspring of a griffin and a mare. Queen Sophonisba gives Lord Juss one hippogriff egg. John Vinycomb states that the hippogriff is not used in the British heraldic tradition. The word "hippogriff" was adopted into English shortly before 1615. Astolfo also borrows the hippogriff from Bradamante to go search for Roland's wits. The hippogriff has a horse's head instead of the traditional eagle's head. Ruggiero and the hippogriff land on an island in the middle of the ocean. In other traditions, the hippogriff represents Christ's dual nature as both human and divine.