Rat Swarm

Rat Swarm is a monster found in the expansion Shadow of Nerekhall.

Description
Rats are common throughout Terrinoth, and although they have been known to spread disease and spoil stores of food, they are otherwise quite harmless. At times, however, they swarm together, as if controlled by a malevolent force. In such great numbers, rats are no longer mere nuisances, and many a hero has vanished beneath a horde of rats, never to be seen again.