The Dragon bones

Before they were to leave for the bones, it was important that they looked at the two knights that were lying dead in the tunnels. It was clear that an assassin had killed them by the way their throats were slit. The problem was, what for?

Why simply just kill two men not closely related to the leaders, had someone from the Dark guild managed to infiltrate the Lion's mouth and was now roaming around? If that was the case, then they were quite the strong assassin for Ray not to be able to catch their presence.

While examining the bodies, Harry looked a tad little impatient, as if he wanted Ray to hurry looking at them. But what Ray was trying to do was going to take some time. Ray was casting one of his skills that would show him the last few moments before a person's death.