When Court of Embereth enters the battlefield, you become the monarch.
At the beginning of your upkeep, create a 3/1 red Knight creature token. Then if you're the monarch, Court of Embereth deals X damage to each opponent, where X is the number of creatures you control.
Non Foil / Near Mint - $5.02
Non Foil / Slightly Played - $4.52
Non Foil / Moderately Played - $4.02
Non Foil / Heavily Played - $3.01
Non Foil / Damaged - $2.51