为 水之水晶 寻找最佳的标准套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
Blue spells you cast cost less to cast.
If an opponent would mill one or more cards, they mill that many cards plus four instead.
, : Each opponent mills cards equal to the number of cards in your hand.
