Caballucos del diablo
"Devil's small horses". In Cantabria (northern Spain), it is told that those creatures appear with a terrific cry at Saint John's Eve, amongst fire and smoke. They are seven winged horses, of seven different colours: red, orange, yellow, white, black, blue and green. The red one is the strongest, and their leader. All the horses are mounted by demons. During this one night, they roam the land, in search of four-leaf clovers, that are rare, and considered as powerful lucky charms. The mission of the horses and riders is to destroy as many four-leaf clovers as they can find, to avoid people searching them next morning to benefit from this gift.