Summary: Five Clans dominate Cultivation World. Known as the Pentarchy, they are the most powerful Clans and produce the most dominant Alphas. To maintain their dominion - both spiritual and economic - the five Clans celebrate matrimonial alliances among themselves.

The Wen Clan has begun to show intentions to dominate the world, assuming attitudes almost of sovereigns with respect to the other four Clans, which has caused that the other leaders have decided to strengthen their relationships through marriages, be they symbolic, real or whatever.

Link: https://archiveofourown.org/works/17464661/chapters/41127227

Note: Written in ABO universe. This one starts with WangXian's union but then shifts focus on 3Zuns. Those who actually are starving for some 3Zuns, especially Nie Mingjue and Jin Guangyao, this is for them. The plot is intriguing since almost every character is shown with a certain amount of gray shade. There is no simple black and white which I loved. The author did an amazing job while creating this plot and building the characters. Everyone should read it.