With the rubble collapsing beneath her and one of her feet missing, Valentina didn't really have time to elegantly descend to the lower floor. Instead she fell down into the collapsing rubble heap while cursing the maid in the back of her mind. Just as she was about to vocalise those complaints though, she felt something.
Just a moment ago, the Archduchess could tell that Dahlia was on her last legs, but she imagined she could hold out for a couple more minutes. Just now though, that assumption was proven incorrect.
All of a sudden, the girl went from being in bad shape, to nearly dead. The amount of damage she sustained in addition to what she already suffered was to the point that it was miraculous she was alive, even with all of the hexes planted on her. By this point, her body had fully given out and she had collapsed unconscious into the calf deep water which, although easy enough to wade through, was poorly suited for breathing in.