While searching for Dorothy in the Emerald City, we discovered tunnels dug into the walls by a pair of Mole brothers (Moehlman, and Moehleman) . The latter of the two offers to join as an ally but only as an ally of a Neutral character. Secret passages can be seen as small black markers in the walls.
Or purple markers if using the Multi-Color tile graphic style.
The Moehleman’s got 125 Hit Points, and attacks at 1d20 swinging twice per attack with a healing spell as a fourth attack round.