This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Manananggal (Philippine mythology)
The word manananggal originates from an expression used for a severed torso. The manananggal is described as scary, often hideous, usually depicted as female, and always capable of severing its upper torso with its intestines trailing out and sprouting huge bat-like wings to fly into the night in search of its victims.
The manananggal is said to favor preying on sleeping, pregnant women, using an elongated proboscis-like tongue to suck out fetuses, or the blood of someone who is sleeping. It also haunts newlyweds or couples in love and sometimes newborn children.