I've discovered that the key to lying to Prince Pointy-Nose is to actually tell him the truth.
Morgana had only to tell him where to look for the druid boy, and the idiot rolled his eyes and gave up the search. Smart woman, Morgana; handy at lying when she's in a pinch. Might have to keep an eye on that...
Anyway, so I'm thinking I'll just tell the Ridiculous Royal about the whole destiny thing. He'll never believe me, of course, but eventually, when the truth comes out, I'll be able to smile smugly and say:
"I told you so."