Vihm are small, nearly hairless rodent-faced humanoids often referred to as Ratlings. A vihm is 2-2.5 feet tall and weighs 35-45 pounds. Vihm are quite cowardly but very cunning and view nearly all larger races as enemies. Strangely the vihm prefer to live in proximity to these larger races, keeping to the nooks and crannies under the very noses of the larger races. The actual dens and burrows that vihm inhabit are extensively trapped.

Whenever possible, vihm set up ambushes near trapped areas with the goal of driving enemies into the traps, where other ratlings wait to utilize flaming oil, drop poisonous vermin, or simply shoot the victims. Vihm typically wear various hides (equivalent to leather armor) in battle.