half of the year and Czernobog control of the waning half. Crnobog In  Slavic mythology   Crnobog  (pr. Tser-nah-bog, to rhyme with There-are-not, in its  Balkan  spelling) was the god of evil and darkness, in opposition to  Belobog . His name means "The Black God" (Balkan Crno "black" and Bog "god",