Complex sentence: As they were saying in unison the Nicene Creed (Apostles' Creed) they heard a voice that identified itself as Kudz coming from a nearby rock saying he was the same chort and the witch turned him into a rock after he helped Vasyl.
Split into simpler sentences: As they were saying in unison the Nicene Creed (Apostles' Creed) they heard a voice that identified itself as Kudz. It was a nearby laying rock who said that he was the same chort and the witch turned him into a rock after he helped Vasyl.