Also: Baba-Yaga, Chernobolg, Belobog and Dzivot are things yo ushould look up. The three first ones are essentially your trifecta of Gods, Baba-Yaha also being the name of the most famous Slavic Witch story of all time. And Belo and Cherno is your basic Ying and Yang. Dzivot is your spirit. Slavic Mysticism is very heavily drawing upon eastern and greek influences.  Your going to have alot in common with Varveras Romi beliefs :D