Guild Wars 2

Um. I found a JP that is accessed from the underground river. The first half is crystals, the second is roots, and I end up meeting a L.O.X. who lets me in a big chamber from Rata Novus days. And… nothing. No chest. No achievement. I can’t find anything to turn on. That was a lot of work for nothing. What am I missing?

You need to dance.

Thanks. I figured the light had something to with it but using emotes never crossed my mind.