A figure of Greek, Balkan and Anatolian folklore, the malevolent goblins called kallikantzaros (previously, literally beguiling centaur in Greek but possibly etymologically sources to the Turkish word 
for werewolf or vampire) are summoned from the underworld during Twelvetide to turn their mischief on humans, there being a reprieve from their infernal, eternal task during this fortnight when it is believed the Earth’s journey through the calendar year is suspended. Consigned to hack away at the trunk of the World Tree and bring about its doom, one Christmas dawns and the Sun stops moving, they are called to the surface, distracted and forgetting about their job, nearly complete, until Epiphany resumes Ordinary Time—and the sawed bough has had the chance to regenerate. In order to save the world, most humans would endure this period of bedevilment but there were additional (see above) ways to keep the kallikantazaroi away, including keeping the Yule Log burning for the duration of the holidays so they could not creep down one’s chimney and through one’s hearth, avoid venturing out late at night and, particularly in Serbia, to refrain from adulterous liaisons since that activity attracts them and will ensure that the affair gets found out.
black mass: Boston is hosting the Satanic Temple’s SatanCon—see previously 
