Complex sentence: One day he came home to find that the villages had given her over to the centipede youkai Hyakuganmaou-who loved to devour beautiful women-and went on a killing rampage to get her back.
Split into simpler sentences: One day he came home to find that the villages had given her over to the centipede youkai Hyakuganmaou (who loved to devour beautiful women). Gonou then went on a killing rampage to get her back.