NYSSA: But there would be records. A people eight hundred years ago capable of molecular engineering?

DOCTOR: Not necessarily. I suspect that when they built the Great Crystal they overlooked one vital factor. The nature of the mental energy would determine the nature of the matter created. The Great Crystal absorbed what was in their minds. The restlessness, the hatred, the greed. Absorbed it, amplified it, reflected it.

NYSSA: And created the Mara.

DOCTOR: Indeed. And in the reign of evil which followed they must have forgotten the most important thing of all, that the Mara was something they themselves had blindly brought into being.

AMBRIL: Now take this, for example. It dates from the middle Sumaran era and unusually is mentioned quite specifically in the Legend. Oh, there can be no doubt. The reference is to the Six Faces of Delusion. Now count. One, two, three, four, five. You will observe there are five faces, not six as the Legend would have it. Now, my point is this. I do find it quite extraordinarily difficult to take seriously a Legend that cannot even count accurately. Of course, artistically speaking, it's an entirely different matter. The piece is exquisite. An undoubted masterpiece.

DOCTOR: What is it?

AMBRIL: Hmm? Headdress.

DOCTOR: Try it on.

AMBRIL: What?

DOCTOR: Try it on.

AMBRIL: Certainly not. Whatever for?

DOCTOR: Please. I want to show you something, then I'll go and leave you in peace.

AMBRIL: Very well.

AMBRIL: Well?

DOCTOR: Now, count the faces again.

AMBRIL: Do as he says.

CHELA: One, two, three, four, five.

DOCTOR: And one makes six. The sixth Face of Delusion is the wearer's own. That was probably the idea, don't you think?