March of Swirling Mist

As an additional cost to cast this spell, you may exile any number of blue cards from your hand. This spell costs {2} less to cast for each card exiled this way.
Up to X target creatures phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

你可以从你手上放逐任意数量的蓝色牌，以作为施放此咒语的额外费用。每以此法放逐一张牌，此咒语便减少{2}来施放。
至多X个目标生物跃离。（它们于跃离期间视作不存在。各永久物会于其操控者下一个重置步骤重置之前跃回。）