The moment Estraeah's outstretched hand brushes the crystal, a pulse of energy reverberates through her body. The glow of the crystals dims. Her flashlight flickers for a moment before going out. When her eyes flit over, she sees that Klaus has also went for one of the black crystals.
The last thing she feels before losing consciousness is an utter emptiness in her chest, as if a cavernous hole has replaced her heart. She does not feel herself hit the ground.