That clause always feels like a plot grenade the author lobs into a family gathering. The specifics vary—maybe the protagonist can’t inherit unless they marry, or they must secure the company by a certain age, or, my favorite, the fortune is tied to reconciling with an estranged sibling. The conflict isn’t just about greed; it’s about forced intimacy. It rips off the polite veneer. Suddenly, a daughter who carved her own path is told her independence is worthless without a ring. A son who was the golden child finds his position contingent on humiliating a rival cousin. The power imbalance shifts overnight, turning dinner tables into negotiation tables. Everyone’s true colors bleed through—the sycophants, the black sheep with unexpected leverage, the quiet one who’s been scheming all along.
I think the best execution is when the clause exposes old, festering wounds rather than creating new ones from scratch. Like in that webnovel 'Cold Heir,' where the patriarch’s will required the three heirs to live together in the family mansion for a year. The monetary prize was almost secondary; the real drama was the decades of resentment, secret alliances, and one hidden child reveal that exploded from that forced proximity. The clause becomes a pressure cooker for every unspoken grievance.