This dangerous beast resembles a half-inch thick black cloak which moves along the ground at night, hunting its prey. It generally attacks sleeping humans, smothers them, then digests them, all in their bed, leaving no trace at all. The only known defense against a lethifold is a Patronus Charm. Thankfully, this frightening creature is rare, only found in the tropics (FB).
Also known as the Living Shroud (FB).
The earliest known account of this creature was written by Flavius Belby, who survived an attack in Papua New Guinea in 1782. (FB)
Another lethifold attack survivor is Celestina Warbeck's mother, who crossed paths with one that was disguised as a stage curtain (Pm).
L. lethum, variation of letum, death (NSOED) + "fold," suggestive of cloth