March of Swirling Mist (Extended Art) [NEO - 447]

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.

Rarity: Rare

#: 447

Card Type: Instant, Instant

Card Color: U

Casting Cost: {X}{U}