"I would help you if I didn't have to risk myself. Or if I could know how much I was risking myself, and had a plan."
"The wraiths are likely still near the hill and watching the halflings. Some could be far away, watching using the horses, ready to ride away if you move towards them and they don't want a daylight confrontation. Some could be close by, hiding invisibly; they're not at any risk since you can't see them and they can run away faster than you can attack them with fire."
"One of them could have followed you here, invisibly, if it wanted, and you wouldn't be able to tell."
"It took me all night to come this far. I was trying to be stealthy and I'm not as fast in the dark, but let's say it will take at least half the day for us to get back to hill. It would take another half-hour to prepare and cast the spells. And then I could leave again, although I'd be going thirty-six hours without sleep at that point, and not planning to sleep the following night either. This should be safe, because I think I can stand off the wraiths in daylight, although I can't be sure and if they're willing to seriously risk themselves they can take me down; one on nine is bad odds."
"Or I could cast Hide from Undead again. I prepared a more powerful version today. But it still lasts only eighty minutes, not even until nightfall. And I still don't want to travel with you if you're not willing to hide the ring that the wraiths can track."