Her eyes widen as she feels the drain, but with herself spread thin maintaining the structure of the mountain, she doesn't have the resources to make a protracted fight or to block her out. That, and with how Valdis knows her, it's inevitable that she collapses, fainting into the other woman's arms as the excess energy is sapped from her. She won't wake without true rest, and so she can be spirited away.

However, another tremble shakes the entire structure. Stronger this time, as if a warning. If Valdis really means to do this, she has only so much time to do so.