An ancient form of the Tengu, or mystic goblin, was the Karasu or Crow Tengu. The Karasu Tengu is capable of kidnapping adults and children, starting fires and ripping apart those who willfully damaged the forest, which is where the Tengu make their homes.
However, the Tengu are not seen as entirely evil and are said to reward modest people and those ready to help. They are often called in prays to help lost children find their way home. It is said they are great masters of martial arts and swordplay.