Look Inside 'The Creature Vault' of Harry Potter Photos Dobby the house elf and Harry Potter are seen in this concept drawing for the Harry Potter films. Warner Bros. released a book by Harper Collins, "Harry Potter: The Creature Vault" which shows the history and concept drawings of the magical creatures the populate the Potter world. Dobby first appears in the second film. A house elf serves one wizarding family unless it is freed from servitude by being presented with clothes. Warner Bros./Harper Collins The concept drawing for Peter Pettigrew, turning into a rat Animagus. In the Harry Potter world, an Animagus is a witch or wizard that can turn into an animal at will. A concept drawing for Bane, a Centaur from the Harry Potter series. The centaurs a species of creature that lives in the woods surrounding Hogwarts. They are an ancient species, a blend of human and equine features. A merperson, which live in the lake of Hogwarts. Thestrals, black, skeletal dragon-faced creatures that are unique to the world of Harry Potter. The thestrals are described as having bat-like wings and a quiet walk, and are used for transportation. They can only be seen by certain people. Ginny Weasley's pet, a pygmy puff named Arnold, is seen in this concept drawing. Arnold appeared the sixth book, "Harry Potter and the Half-Blood Prince." A concept drawing for a garden gnome, which live in the Weasley's garden in the Harry Potter films. The gnomes are a nuisance in the book, and were edited out of the second film. A goblin, which work at Gringotts in the Harry Potter films, is seen in this concept drawing for the films. A dementor, infamous for their soul-draining power, is seen in this concept drawing for the Harry Potter film series. Dementors serve as the guards of the prison Azkaban, and are among the dark creatures in the series. The Hungarian Horntail, a dragon that Harry Potter fights in "Harry Potter and the Goblet of Fire" is seen in this concept drawing. Fawkes, a phoenix, is seen fighting the basilisk in this concept drawing for the second Harry Potter film. Phoenixes are immortal and can regenerate for infinite lives. Fawkes lived in Dumbledore's office for the duration of the Harry Potter series and rescued Harry on a number of occaisions. A grindylow, a unfriendly lake-dwelling creature, is seen in this concept drawing. Aragog, seen looming over Harry Potter in this concept drawing for Harry Potter and the Chamber of Secrets. Aragog is an acromantula, a giant spider-like creature that lives in the forest of Hogwarts. Buckbeak the Hippogriff is seen with Harry and Hermione in this concept drawing for Harrpy Potter and the Prisoner of Azkaban. A hippogriff is a eagle-headed equine creature that lives in the forest of Hogwarts that is known for its pride.