The dragon flinches, at the mention of the mass shielding, and seems to debate between calling his bluff, and standing down. Then he remembers what he's dealing with and relaxes. Slightly. "I'm afraid I don't see things your way; as you say, you do not intend to leave without my treasure and I, as you are well aware, am more willing to destroy it than let anyone else have it. So it seems we are at an impasse, as none of the options seem to be in my favor, and I have nothing to lose."