A Very Civil Whist: My Favorite Mechanism

About A Very Civil Whist, from BoardGameGeek:

A Very Civil Whist is a Strategic level historical board-wargame that puts you in the middle of one of the most turbulent periods in English history. In this game, you'll play as either the Royalists or Parliamentarians, two opposing factions vying for political, economic and religious control of England. The game is based on the classic card game German Whist, but with a few twists – you'll be able to play with leaders and assets that represent key actors of the first English Civil War. With strategic play and a bit of luck, you can lead your faction to victory and secure your place in history. Taking place in the mid-17th century, the first English Civil War was a time of great political and social upheaval. The conflict pitted the supporters of King Charles I against the supporters of Parliament, who sought to limit the monarch's power and establish a more democratic government. As you play A Very Civil Whist, you'll experience the tension and drama of this critical period in English history. Will you be able to rally your troops and secure victory for your faction? Or will you fall to your opponent and be consigned to the dustbin of history? The fate of England rests in your hands! -description from the designer