March of Swirling Mist - #61

Set: Kamigawa: Neon Dynasty
Type: Instant
Cost:
Color: Blue

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.)