When Court of Ambition enters the battlefield, you become the monarch.
At the beginning of your upkeep, each opponent loses 3 life unless they discard a card. If you're the monarch, instead each opponent loses 6 life unless they discard two cards.
Non Foil / Near Mint - $7.12
Non Foil / Slightly Played - $6.41
Non Foil / Moderately Played - $5.70
Non Foil / Heavily Played - $4.27
Non Foil / Damaged - $3.56