Dragon

Hudson, Goliath, and Demona battle a dragon in the Gargoyles: Dark Ages pitch. [1]

Dragon is a term used to cover a variety of large beasts and beings that fly and breath fire.

Characteristics

A dragon, presumably Wyvern is the subject of an oath ("By the Dragon,...") used by "Iago", Angel, and Hudson. ("Possession", "Tyrants", "Render Unto Caesar", "The Dream")

When the Commandos depart from Castle Wyvern, Hudson thinks at first that their helicopter is a dragon, before Lexington identifies it to be a machine. Even years later, he still thinks of helicopters as "modern day dragons". ("Awakening: Part Two", "The Reach")

A magically animated stone statue was also encountered by (and destroyed by) King Arthur, Griff, and Macbeth in the Brooklyn Botanical Gardens. The sword Excalibur was hidden inside the statue. ("Pendragon")

[2]