Her glance is a little surprised, and then ... oddly grateful?

"Well." She gives the sand wall of the castle one more smoothing stroke. "A lot of things, though not all at once. At home I can heal minor injuries, or speed up the healing of major ones, and cure some diseases. Make contaminated water or food safe to use. Shield myself or other people from attack, temporarily. Find lost people or things, if they're close by. See things far away, if I know what I'm looking for. Some more ... aggressive things, if I wind up in a fight, or needing to stop one."

(She's debating, with full awareness of the implications, whether or not to mention walk on water.)