Barrow Dragons is a race of lesser dragons, nearly as small as wyverns or about the size of two oxen, that most often make their abode within dark and dry subterranean lairs.
If thrown into a moat or a ditch, they react with water to make an area of ground a foot wide and solid enough to walk on rise from the bottom. If eaten-well, the body of the one who ate one of them is a real mess. Used to storm moats and forge rivers, streams and ditches. Must be kept dry until used.