Complex sentence: Buckman and his lover, Paris Seville, eventually rose to the leadership of the Council of the Chosen, the secret cabal leading the club, and took on the titles of White King and White Queen, respectively.
Split into simpler sentences: Buckman and his lover, Paris Seville, eventually rise to the leadership of the Council of the Chosen, the secret cabal leading the club. They take on the titles of White King and White Queen, respectively.