"Is this the spring? It's so shallow."
"I wouldn't touch that water if I were you. It's weak, but I can feel the magical energy there."
Medb dashed before Ritsuka had the time to tell her she didn't need to come and positioned herself between Ritsuka and Aisha. Medb stopped Ritsuka from approaching what was ostensibly the spring water.

- Chaldea Case Files: Caged Girls