A VAMPIRIC WITCH from France, the gaukemares assaults sleeping people. The witch shapeshifts into an INCUBUS or SUCCUBUS and drains its prey of their life- energy and sexual energy a little each night (see ENERGY VAMPIRE and LIVING VAMPIRE). The victims will be weak and have leg cramps at night, growing more and more tired as the nightly assaults continue; if the witch is not stopped, the victims will eventually die. Placing SALT under one’s pillow and saying prayers at night keeps the witch away.

Source: Praetorius, Blockes-Berge Verrichtung