Tiyanak - Demon Child

Tiyanak or impakto, another mythical creature in the Philippine Mythology, are babies who died before receiving baptism rites. After death, they go to a place known as Limbo, a chamber of Hell where unbaptized dead people fall into, and transformed into evil spirits. These phantasms return into the mortal realm in the form of goblins to eat living victims. The tiyanak can also be the offspring between a demon and a human.

The tiyanak can also be the offspring of a woman and a demon. It can also be the aborted fetus, which comes to life to take revenge on its mother. Tiyanak are very vengeful creatures. Most Tiyanaks are said to live in forests. If they see a human, they transform into what looks like a normal baby. When the person notices the Tiyanak and comes near to take a look at it, that's when the Tiyanak changes back to its true form and eats its prey.

Tiyanak Origin
While there are many versions about how a Tiyanak looks like, it's ability to cry like a baby is its most powerful camouflage to attract victims. Some popular versions also say that a Tiyanak is a spirit of an unborn child whose mother died before giving birth. This mythical creature are also sometimes related to a Malaysian folkloric creature called Pontianak which is, according to Malay folklore, a woman who died during delivery or childbirth.

Tiyanak Countermeasures
Though this legendary creature is deceitful in attacking its prey, one can bewilder the creature and break loose from the enchantment of its cries by turning his clothes inside out. The legend has it that Tiyanaks find this method laughable and would just leave the victim.

Source: Wikipedia