Riverhoof is a type of Woolcrest, a fallen warrior shieldsman. They make their first appearance in Jacksmith.
Riverhoofs are amphibious monsters that lurk in marshes and swamps throughout the Plumpfeather Kingdom. The Riverhoof is a type of Woolcrest that has been enchanted with the element of Water. There are seven other elemental forms of a Woolcrest that can be found across the land. Variants include Firefleece, Freezefur, Rockram, Woolwind, Bellweather, Mossback, and Bainsheep. All of these dangerous Woolcrests are under the complete control of the great wizard, Dudley.