Kalku or Calcu, in Chilean folklore and the Mapuche mythology, is a witch or shaman, usually an evil one, but not necessarily. However, the good shamans are referred to as Machis, so as to not denote the witches' malice. Its origins are in Mapuche mythology. This article is part of the Witchcraft series. ... The shaman is an intellectual and spiritual figure who is regarded as possessing power and influence on other peoples in the tribe and performs several functions, primarily that of a healer ( medicine man). The shaman provides medical care, and serves other community needs during crisis times, via supernatural means (means... Mapuche (Mapudungun; Che, People + Mapu, of the Land) are the original Amerindian inhabitants of Central and Southern Chile and Southern Argentina. ...

The kalku has the power of using wekufe (spirits or creatures wicked). An example of wekufe is the Nguruvilu.