Koldunic sorcery has been, as of secret of the tal'me'rah, turned into a before and after joining the sabbat blood magic.

The newest version (the one before joining the sabbat) has the kranias. Basically you're channelling the spirits of the land with your blood. Oh, and you're a drug addict. Knowledge of new kranias is a drug your addicted to, and your in a kinda sith system of masters and apprentices. "One to embody power, the other to crave it."

The old version( after joining the sabbat) has the ways. Upon makingt the ritus rituals, the koldun also kinda...