Sans gives Luce an edgy kind of look, sweat already prickling across his skull - did she just speak in his head? At first, he doesn't even factor Doctor into the equation, but it makes just as much sense that Luce could have developed witch powers.

The guitar? Why the guitar. Well, it would certainly get Greg to stop playing, wouldn't it? It does seem like this might be an act first and ask questions later kind of situation.

Besides, what has he got to lose?

"If you say so," he says out loud, inwardly flinching at the sight of those sparks. This isn't going to be fun, he thinks, before teleporting straight up onto the stage and trying to get his hands on that guitar while his body glows blue in an attempt to let gravity suck those little stars away from him.