Harpy

A Harpy was a type of monster that appeared in the novel Supernatural: Rite of Passage.

Powers and Abilities
A harpy was a monster with fairly weak abilities:
 * Flight - With their wings, harpies are capable of flight.
 * Talons and Claws - On their hands and feet, harpies possess deadly talons and claws.
 * Super Strength - A harpy is stronger than a human, able to throw a grown man across a clearing and lift two grown men into the air, albeit with difficulty.
 * Invulnerability - A harpy can only be killed by being burned though they are susceptible to being injured.
 * Regeneration - A harpy can heal any damage to itself if its body is not burned. They are capable of quickly recovering from bullet injuries to their hearts unless a knife is put through the heart to make it more permanent.

Weaknesses

 * Massive Heart Damage - Massive damage to a harpy's heart could incapacitate it temporarily. A bullet to a harpy's heart would incapacitate it until the wound regenerated, but sticking a knife into the heart would incapacitate a harpy until the knife was removed or the harpy was burned.
 * Fire - The only way to truly kill a harpy is to burn their body.

Appearances

 * Supernatural: Rite of Passage