Complex sentence: Through Oboro's enticements she subsequently joined his scheme as a member of the Three Blades of Domination and used her heavenly powers to conduct religious services and rituals in which she was revered as a religious symbol (shrine maiden).
Split into simpler sentences: Through Oboro's enticements she subsequently joined his scheme as a member of the "Three Blades of Domination". She used her heavenly powers to conduct religious services and rituals in which she was revered as a religious symbol (shrine maiden).