Covered with rotting meat from nearby wildlife, the Troll's lair reeks of death.  If the stench alone wasn't enough to scare off an unfortunate travelers who stumbled upon it, the bones of unlucky spelunkers would be.  The Troll places his spoils near the numerous stalagmites on the damp cave wall, his red eyes patiently scanning the dark cave interior for anything that may disturb his isolation.
The Troll's Lair, Cave
a captured knight
a rat feasting on leftovers
Mmmmm, leftover banquet food! I'm just a rat so this is amazing! A little meat, a little cheese...how about a little EVERYTHING!
Mmm, the bones have such flavor! Look's like you are getting a meal. What if I told you that there is endless meat, out there? If you help me escape I'll take you with me and there will be meals for the rest of your days.  Hmm? You know of such a place? Greater than this one? Out there! There is a whole world. But it can be very dangerous for a rat. Let me be your guide. I just need your help to get free. 