Nyssa would find that the stab marks led towards the dancer floor. They were rather deep and wide, seeming to come from a longsword rather than a dagger, maybe even a greatsword. As she approached the dancers continued to ignore her, however she would quickly realize that the marks were leading towards the very center of the dance floor, right under the grand chandelier. If she wished to follow them to the end she would have to weave into the middle of the circle of dancers.