Lethifold

The Lethifold (also known as a Living Shroud) is a carnivorous and highly dangerous magical creature. Its appearance resembles that of a black cloak roughly half an inch thick, although it gets thicker if the Lethifold has recently digested a victim. It glides along the ground and other surfaces in an unknown form of locomotion in search of its prey, humans. It attacks its prey at night, when the target is asleep, and suffocates and digests it in its bed.

The only form of protection against a Lethifold is a Patronus. Other spells such as the Stunning Spell will not work.

The Lethifold is a very rare species, and can only be found in the tropics.