When the explorers of the Frozen City talk about rats, they are generally referring to the giant variety, as those are by far the most dangerous and aggressive type. That said, there are times when a swarm of normal-sized rats can be just as threatening. While normal rats are generally skittish, certain types of dangers such as fire, explosive magic, floods, etc., can cause them to panic. If panicked, these rats stampede, gathering in a large swarm and attacking any perceived danger that gets in their way. Once such a swarm has formed, it is difficult to stop.

2 Swarms per pack. Metal models, supplied unpainted.