Zeernebooch is a mysterious figure of the Classic World of Darkness and, allegedly, a god of the underworld. During the reign of Julian the Apostate (360-363 CE), the Lasombra Marconius obtained a potion of what was said to be the dark god's blood from a mage and, upon drinking it, was transformed into the first of the Kiasyd. Some believe that this potion also contained the blood of Unseelie changelings. This deity's connection to the underworld explains why the original version of the Kiasyd bloodline (from the Storytellers Handbook to the Sabbat) have Necromancy as a Discipline.