Tar stalker

"In addition to lurking in the ceilings, they can also stalk in the walls as well. While they are more prevalent near the ceiling in most areas, in tight spots of a cavern or dungeon they stick to the walls, grabbing anything that carelessly turns a corner or enters a tight passageway. Carrying fire is a good self defense, however it has to be a very strong fire or of a magical source to be of any effect as it can easily be smothered out by the tar beast."