Vampire Ghouldeaths are dragons that are mentioned once in the beginning of How to Steal a Dragon's Sword. "They were a mixture of some of the nastiest types of dragons in the Archipelago: Razorwings and Tonguetwisters and Doldrums and Vampire Ghouldeaths." ―How to Steal a Dragon's Sword These were the Red-Rage dragons that attacked Hiccup and the other young Vikings as they slept in hammocks on the cliffs at the Gorge of the Thunderbolt of Thor.