Luka's intuition is right-on. When he calls out with that name, he'll feel everything go very still. Very calm. The crystal has stopped moving. The people exiting the cafe he's in are almost entirely vacated at this point, and there comes a voice that's more like glass being dragged through gravel than it is a voice at all. It crackles like it's having a hard time.

"What did you do?" The Wizard asks from the door, staring at the crystal but addressing Luka.