March of Swirling Mist 
Instant
$3.98 #1615 0.37 4.7 years
As an additional cost to cast this spell, you may exile any number of blue cards from your hand. This spell costs 
less to cast for each card exiled this way.
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.)
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Cards similar to March of Swirling Mist expected a card that isn't here?
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Guardian of Faith88%
$0.62↓#19260.415.2 years
"When this creature enters, any number of other target creatures you control phase out."
Gallifrey Falls // No More86%
$0.54↓#10244↓0.353.0 years↓
"Any number of target creatures you control phase out."
Change of Plans83%
$12.35↑#7053↓0.50↑4.5 years
"Each of X target creatures you control connive. You may have any number of them phase out."
Galadriel's Dismissal82%
$27.06↑#16350.73↑3.0 years↓
"Target creature phases out. If this spell was kicked, each creature target player controls phases out instead."
Cauldron Haze80%
$0.30↓#10511↓0.05↓18.2 years↑
"Choose any number of target creatures. Each of those creatures gains persist until end of turn."
Brokers Confluence76%
$1.40↓#10269↓0.14↓4.5 years
"• Target creature phases out."
Slip Out the Back76%
$3.40↓#1089↑0.22↓4.5 years
"Put a +1/+1 counter on target creature. It phases out."
Clever Concealment74%
$3.61↓#549↑0.63↑3.7 years
"Any number of target nonland permanents you control phase out."
Vodalian Illusionist74%
$0.32↓#17948↓0.4729.4 years↑
", 
: Target creature phases out."
, : Target creature phases out."
Haystack74%
$0.32↓#5042↓0.50↑2.3 years↓
", : Target creature you control phases out."
, : Target creature you control phases out."
Wave of Indifference72%
$0.14↓#23482↓0.56↑24.0 years↑
"X target creatures can't block this turn."
Misdirection71%
$12.41↑#14930.95↑27.0 years↑
"You may exile a blue card from your hand rather than pay this spell's mana cost."
+1 more matching line
Cauldron of Souls70%
$6.86↑#4395↓0.3718.5 years↑
": Choose any number of target creatures. Each of those creatures gains persist until end of turn."
: Choose any number of target creatures. Each of those creatures gains persist until end of turn."
Sapphire Medallion70%
$7.87↑#354↑0.3429.0 years↑
"Blue spells you cast cost 
less to cast."
less to cast."
Word of Binding70%
$0.14↓#26535↓0.13↓32.2 years↑
"Tap X target creatures."