"Well, modify them as you will, but here are my suggestions:
'Was the intent of whatever or whoever contacted us a deception of any sort, or was it in earnest?'
'Was it an intelligent being?'
'Does the crystal sea and the fact that it contacted Verra, as a psion, signify that it involves psionics rather than magic?'
'Were there other persons who received the message?'
'Would it bring overall harm or good to seek it out?'
'What is the most expedient way of seeking it out?'
Lysander pauses a moment. "The last one's not a yes/no question, I realize, but I think it might be worth a single question for something that could shorten our quest by an unguessable amount of time. Of course, if we have nine questions we absolutely need to ask, we can omit that one. Any more ideas?"