Drude
In German folklore, a drude is a kind of malevolent nocturnal spirit associated with nightmares, prevalent especially in Southern Germany. Druden were said to participate in the Wild Hunt and were considered a particular class of demon in Alfonso de Spina's hierarchy. The word also came to be used as a generic term for "witch" in the 16th century.
The word is attested as the Middle High German trute, and in early modern lexicography and down to the 19th century, it was popularly associated with the word druid, without any etymological justification – its actual origin is unknown. Jacob Grimm suggests derivation from a euphemistic trût , but cites as an alternative suggestion a relation to the valkyrie's name Þrúðr. If so it is natural to connect the druden with the daughter of the chieftain of the gods in the Norse religion, Thor, and his wife Sif.
''Drudenfuss''
The Drudenfuss, literally "drude's foot", is the pentagram symbol, believed to ward off demons, explicitly so named in Goethe's Faust. The word has been in use since at least the 17th century, recorded by Justus Georg Schottelius. Its apotropaic use is well recorded for 18th- to 19th-century folk belief in Bavaria and Tyrol.Drudenfuss is also the German name of the pentagram used as a heraldic device besides the more descriptive Pentalpha or Fünfstern.
Drudenfuss is another name for mistletoe.