In Scottish folklore, kelpies are shape-shifting water spirits that inhabit lochs and rivers. They are said to appear as horses, but can also take on the form of a handsome man or a beautiful woman. Kelpies are known for their malevolent nature and are said to lure unsuspecting humans to their doom by tempting them to ride on their backs. — chatGPT
When thowes dissolve the snawy hoord
An' float the jinglin icy boord
Then, water-kelpies haunt the foord
By your direction
An' nighted trav'llers are allur'd
To their destruction.
— Robert Burns, Address to the Devil, 1786