Woraug

Woraug thought Cimorene was improper when she came to ask to be a dragon's princess. It turns out that Woraug was in league with the wizards, had poisoned the previous king, and tried to rig Colin's Stone into picking him as King of the Dragons. When Kazul, the true King of the Dragons, presented him with his crimes with evidence from Cimorene, the Stone Prince, and Alianora, he was charged with undragonlike behavior and he became a frog.

A year later, the scales that had fallen off of him were enchanted and placed in a barren patch of the Enchanted Forest to make it look like the dragons were attacking when it was really the wizards causing trouble again.