What followed was a nearly-untintelligible string of information from the alien/demon, all about what he knew and did not. The Doctor caught something about the rest of his kind coming once the Gate opened, which would happen in their next calendar year.
He seemed to remember something about one of this thing's years being half a human lifespan.
"Interesting he's so important to the rest of them," he said.
"Family," the thing said.
"Ok. Well, this was fun. Now you can go tell your family why it is exactly that they need to get off of this rock as fast as their squishy legs can carry 'em. Or I'll send her after you."