River Troll River Trolls live in rivers, swamps, and other dank places. They are slimy, scaly and even more smelly than your average Troll, which is saying something. Enemies attempting to attack a River Troll in close combat suffer a -1 penalty on their dice rolls to hit due to the stench and slime. This penalty cannot make a Troll impossible to hit - a roll of 6 will always score a hit regardless of how slimy he is.