When Knights of the Black Rose enters the battlefield, you become the monarch.
Whenever an opponent becomes the monarch, if you were the monarch as the turn began, that player loses 2 life and you gain 2 life.
Non Foil / Near Mint - $0.43
Non Foil / Slightly Played - $0.39
Non Foil / Moderately Played - $0.34
Non Foil / Heavily Played - $0.26
Non Foil / Damaged - $0.22