Leon would say, "You keep mentioning this 'doctor'. Doctor Who?"
"Just The Doctor," Emerald said, "It's the name he chose. The word for healer and wise man throughout the universe, they get that word from him. But to some, it means great warrior. Throughout the Universe, if echos of his name are whispered there are entire armies, entire civilizations that turn around."
Emerald paused to let those words sink in, "There's a legend, similar to one you know - the legend of the Pandorica. It says, there was a goblin, or a trickster, or a warrior. A nameless, terrible thing. Soaked in the blood a billion galaxies; the most feared being in all the cosmos. And nothing could stop it, or hold it, or reason with it. One day it would just drop out of the sky and tear your world apart.
The Pandorica was constructed to hold this monster. When it began to open, the Doctor went to stop this monster. But little did we know, the Pandorica and the legend were built for the Doctor."