She smiled. "It's not very expensive, but it's quite difficult to acquire, mostly because its uses are... fairly limited, after all, and it's not well-known. And I'm perfectly happy keeping it that way," she said with an impish smile. "Now, consider what questions you wish to ask; I have some paper and a pen in my desk, over there, so please, take your time, and include possible followups. With the Commune spell, if I take a break of more than a few seconds, the spell ends."