A Piwichen is an Under Fae creature.
The Piwichen is cranky and its sharp claws contain a type of toxin.
The Peuchen (also known as Piwuchen) is a creature from the Mapuche mythology and Chilote mythology pertaining to southern Chile, a much feared shapeshifting creature which could instantly change into animal form. It has often been described as gigantic flying snake which produced strange whistling sounds, while its gaze could paralyse an intended victim and permit it to suck its blood. It has often been reported as the cause of sucking blood from sheep.