I thought of a character type that would specialize in traveling through underground sewer networks and the dungeon board.
Sewer Creeper
Strength: 3, Craft: 3, Fate: 2, Lives: 4
When the Sewer Creeper rolls a die for movement, if he starts his turn on the village, city or tavern space, he can make his move originate from any one of those three spaces.
When in the dungeon, the Sewer Creeper can roll two dice in combat and pick which die to use.
When in the dungeon, the Sewer Creeper can roll two dice for movement and pick which die to use.
Alignment: Evil, Start: The City