Feldgeister
Feldgeister ('field spirits'; German: [ˈfɛltˌɡaɪ̯stɐ]; singular: Feldgeist) or Korndämonen ('corn demons'; German: [ˈkɔʁnˌdɛˈmoːnən]; singular: Korndämon) are corn spirits in German folklore. Feldgeister are often also wind spirits, causing lightning and rain.