Troll Bridge
A very big problem from a very small source.
Pay the toll or feed the troll' seems pretty obvious. Too bad that it isn't.
A tricky gnome has used illusions to fleece anyone crossing a bridge, posing as a fearsome troll. To direct more traffic across his bridge, he has also set fire to the Great Bridge downstream. The players find the Great Bridge burned and follow this detour.
At the bridge, the players will fight with the illusory troll. After a few rounds, it flees back to the gnome's lair under the bridge, and the players will need to deal with a combination of the gnome and his traps if they investigate.
Pgs. 22,23 & 69