No, I don't think he does. I suspect he knows more about it than he was willing to say, so he is keeping us in the dark.

He did say that Alem stumbled upon it accidentally and that it has the power to free Rathakku. It might be under the fortress, perhaps encountered during mining? Maybe that's a reach but he used the words "pandemonium at our feet."

A kick in the ass is the least of what they deserve. We're the only people who seem at all concerned for her.