His ears perk at the idea of "finishing the spell". He has some thoughts about that too, but before he can turn to voice them, that electric thrum races up his arm. He stands up a little straighter, pulling his hand away for just a moment.

"N-no," he murmurs, "It was just... fuzzy." He shakes his head a little, unsure how to explain what he means. Instead, he places his hand back onto the crystal and leans slowly forward. If, at any point, it starts to hurt him, he'll let go again, but if not, he's going to press his ear to the surface of it, blinking curiously.

"I can't hear you," he offers after a beat, "Are you saying something?"