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.)

你可以從你手上放逐任意數量的藍色牌，以作為施放此咒語的額外費用。每以此法放逐一張牌，此咒語便減少{2}來施放。
至多X個目標生物躍離。（它們於躍離期間視作不存在。各永久物會於其操控者下一個重置步驟重置之前躍回。）