Also known as Czernobog, he was a dark demonic deity in Slavic mythology. His name means ‘Black God’.
Only coming out at night he causes calamity and disaster, bringing bad luck and misfortune wherever he turns. His opposite number is Belobog, the White God of Goodness. Few would pray to such a god but one early passage reveals that people would spit curses into a bowl during feasts to keep him at bay.
Little else is known about him. The only historical sources, which are Christian ones, interpret him as a dark, accursed god, but it is questionable how important or malicious he really was. The name is attested only among West Slavic tribes of the 12th century, therfore it is speculated that he was not a very important or very old deity.