OOC:
Here's what Igbork can remember about Kelpies: Kelpies are malevolent amphibious fey shapechangers intent on luring mortals to their doom. These cruel predators lurk in and around areas of water, slightly preferring freshwater over saltwater. Kelpies lure or drag their prey underwater then drown and devour them, leaving behind only the victim's heart and liverโ the only parts of a meal kelpies find unpleasant. Kelpies are fond of magically disguising itself as fine steeds or attractive strangers to draw in victims, but its true appearance takes the form of a hideous equine with slimy, green flesh resembling aquatic plants.
Some fanciful stories about kelpies speak of them appearing in equine form wearing riding tack, complete with silver stirrups and bridle bit. These folktales claim that cutting the harness from the kelpie's body grants the bearer power over it, or causes the kelpie to sicken and die.
You also remember that they as fey creatures are vulnerable to cold iron.