I decided to try and find out what a group of dragons is called. The first that came up was a flight of dragons. Christopher Paolini calls them a thunder of dragons from the noise their wings make. Other names include a school of dragons, a weyr of dragons, and a wing of dragons. The Japanese word for a grouping of dragons is “Tatsu” apparently.
What word would you use if you were coming up with one. I would say a fiery of dragons.
The Story Shed 