Kelpie
M.o.m classification: xxxx
This British and Irish water demon can take various shapes, though it most often appears as a horse with bulrushes for a mane. Having lured the UN-wary on its back, it will dive straight to the bottom of its river or lake and devour the rider, letting the entrails float to the surface. The correct means to overcome a Kelpie is to get a bridle over its head with a Placement Charm, which renders it docile and unthreatening.
The worlds largest Kelpie is found in Loch Ness, Scotland. Its favorite form is that of a sea serpent(see below).