Gargoyles are large winged monsters. In Book 1, four of them were released with the demon Bahumat. They were quickly dispatched by the empowered fairy army. In Book 4, one attacks at the hotel, along with a goblin and a wolf-like creature.
There are two specific types of giants that make an appearance in Fablehaven, though others are mentioned, (such as a Snow Giant), or implied. The preserve contains a few Fog Giants, that frequent the marshlands. And book 4 introduces a Sky Giant, largest of all Giants in the world.
Goblins are generally evil creatures that can disguise themselves. Seth was tricked by goblins on Midsummer's Eve. The goblins were disguised as wolves attacking a crying baby. Seth opened the window and three goblins came into the house. Voorsh and Slaggo are the goblins who are in charge of upkeep in the dungeon. They said in the second book that they would only help Kendra and Seth escape if Grandpa gave them a goose.
A creature made out of natural materials and given life by a powerful spell. They are typically servants who always obey their master. The only golem shown in the series so far is Hugo. True golems have a will of their own, though they are loyal to their master. True golems were thought to be extinct, but Hugo, who had originally been a copy of a true golem, and had no will of his own, was destroyed by Muriel the witch, then re-created by the fairies. It appears that they restored him as a true golem, and he is developing his own will.
A flying beast with the head, wings, and talons of an eagle, attached to the body and rear legs of a lion. They appear with the Sky Giant's dwarf and take them prisoner to the Giant. They attempt to rescue the team from a dragon ambush, and successfully bring Seth to the Giant.
These are creatures related to dryads. However, they are linked to a single tree. Ephira, a cursed Hamadryad, who is mentioned in the first three books, has a significant part in Grip of the Shadow Plague, as she was co-creator of the plague with the demon Kurisock.
Hermit Troll
In book 3, Tanu and Coulter see a mysterious creature near the Nipsies domain. They guessed it was a Hermit Troll, the smallest of the trolls. It was only about 3 feet tall, wore a black hood and moved close to the ground. Bubda is a hermit troll in book 4 who occupies the space in the magical knapsack. He can camouflage himself, hide from detection, and loves Yahtzee.
Armored snakelike men. Dale, Tanu, and Coulter had to fight one guarding the artifact in the Inverted Tower of Rise of the Evening Star. In Grip of the Shadow Plague, several were guarding the black tree with the nail in the battle between light and dark creatures.
A monster with several dragon-like heads, and the first guardian of the Dragon Temple. The beast called herself Hespera. The hydra surfaces out of a pool as the team passes, blocking their exit from the Temple. It has no less than 15 heads, some wounded and scarred. They succeed in confusing some of the heads, revealing the governing head, which they attack. They successfully pass the hydra, but must confront it again to leave the Temple.
Imps are fairies who have been captured and kept inside over night. Also considered a Fallen Fairy. Seth caught a fairy and kept it in a jar overnight and it turned into an imp. In the end of the first book, the fairies turned into life size fairies. So did the imps. In Rise of the Evening Star large imps attack Grandpa and breaks some of his bones, putting him in a wheelchair for most of the book. They also attempt to capture Kendra and Seth, but Mendigo stops them by breaking their arms and legs. The names of the imps released from the dungeon by Vanessa are Grixt, Huro, and Zert. In Book 4 it is revealed that Imps originally rose from fallen male faires (see Astrids).
Like a Genie. Grandma tells the children about one they had imprisoned while giving them a tour of the dungeon. She explained that he was responsible for turning her into a chicken the previous year.
