Maegran the Whisperer

Maegran is a powerful black Dragon that once resided in the mountains of Kel. Maegran, often called the Whisperer, was a cunning Dragon that preferred to use his extraordinarily capable brain instead of his talons or fire breath. The stories say that every night he would fly to the castle of Baron Edhald of Ellewall. There he would somehow whisper to him until the Baron was driven mad.

Nowadays this has created a famous saying ; You're whispering like Maegran! This means someone is nagging or talking nonsense.