Wait for the royal council to gather

Some jolly entertainment has turned into a dark tragedy. Just as everyone was about to go home, a servant who'd been feeling sick all day suddenly just... exploded! A monster jumped out of his body and attacked the guests. Could it be that every magical beast we've seen... Oh, it's horrifying to even think it! But we do have to think, and think well — how else can we stop this calamity? The baroness should discuss the situation with his advisors.