守责骑士 (CS Knight of Obligation)

生物～ - 人类／骑士    (CMC:4)

警戒 敲诈（每当你施放一个咒语时，你可以支付。若你如此作，则每位对手各失去1点生命，且你获得等量的生命。）

即使在致命决斗中，他仍能计算利息至小数点后六位。

18 GTC • CSRyan Barger — watermark: Orzhov

™ & © 1993—2013 Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Modern,Return to Ravnica Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

Knight of Obligation {3}{W} Creature — Human Knight Vigilance (Attacking doesn't cause this creature to tap.) Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) 2/4

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View this MTG card on Gatherer

4/15/2013
You may pay  a maximum of one time for each extort triggered ability. You decide whether to pay when the ability resolves.
4/15/2013
The amount of life you gain from extort is based on the total amount of life lost, not necessarily the number of opponents you have. For example, if your opponent's life total can't change (perhaps because that player controls Platinum Emperion), you won't gain any life.
4/15/2013
The extort ability doesn't target any player.

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Card Knight of Obligation is not on TCGPlayer.