What would they have done if the flying dragon broke the magic barrier and escaped outside?
Obviously it would cause a tumult.
“Also, the Duke Hertha household’s debts exceeded the royal family’s maximum permissible level of tolerance. In order to catch a flying dragon they had to pay the costs for elite adventurers. There were also the costs to cover the flying dragon in specially made mithril coated armor. The bookmakers had to be paid too. The other day seems to have been the finishing blow.” (Armstrong)