This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Monai (Guaraní mythology)
The third legendary monster of the Guarani is Monai, lord of the air and spirit of open fields. Like Mboi Tui’I, Monai has the body of a serpent, but upon his head are two horns that function as antennae. The antennae have hypnotic powers which can mesmerize his prey, allowing him to hunt with ease.
Monai is believed to be a mischievous creature who is fond of stealing and hiding his loot in caves. For this reason, Monai was blamed whenever villages were raided or treasures went missing.