Going right for the guitar? Yeesh, he knew Sans was uninspired and all, but this is just irritating. There's no class, no style to it. Mr. Universe does his best to counter with a twirl of the guitar to break that bony grip--THIS is how you do it with a little pizzazz, he internally mocks with a wagging tongue.

"Perhaps it would help if I demonstrate
How the center can keep up its sickening spin"

What catches him completely off guard, however, is Luce. It shouldn't be a shock to see here here so much, beyond that he hasn't crossed paths since her escape. More, it's what she's doing that bewilders him. Luce has no magical music, he's sure... he never sensed it on her in any capacity, not even now, yet there's undeniably something else than just her melody pulling at him as she sings, separate from the more familiar but equally dangerous tune Doctor's playing.

The gem above glints with warm golden light, and Mr. Universe doubles down with a glower. There's no time to be so easily distracted with Sans still trying to pull away his guitar. Branches of the ostentatious indoor trees tremble a moment, before whipping forward to grab at the skeleton.

"Thank you, my treacherous friends
Perhaps for my future your service will smile."