Dispersal Shield 
Instant
$0.13 #17096 0.81 23.3 years
Counter target spell if its mana value is less than or equal to the greatest mana value among permanents you control.
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Reject Imperfection84%
$0.29↑#4722↑0.13↓3.6 years↓
"Counter target spell. If that spell's mana value was 3 or less, proliferate."
Hypnotic Sprite // Mesmeric Glare80%
$0.12↓#5728↑0.11↓6.9 years↓
"Counter target spell with mana value 3 or less."
Spell Burst80%
$0.41↑#10188↑0.40↓19.9 years↓
"Counter target spell with mana value X."
Runescale Stormbrood // Chilling Screech78%
$0.26↑#10144↑0.08↓1.4 years↓
"Counter target spell with mana value 2 or less."
Spell Snare78%
$0.42↑#8442↑0.39↓20.3 years↓
"Counter target spell with mana value 2."
Out of Bounds78%
$0.22↑#183010.44↓8.2 years↓
"Counter target spell."
Accelerated Mutation78%
$0.08↓#25084↓0.25↓23.3 years
"Target creature gets +X/+X until end of turn, where X is the greatest mana value among permanents you control."
Prohibit78%
$0.14↑#22541↓0.36↓25.9 years↑
"Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead."
Torrent of Fire78%
$0.05↓#28465↓0.19↓23.3 years
"this card deals damage to any target equal to the greatest mana value among permanents you control."
Minor Misstep76%
$0.17↑#147201.00↑3.6 years↓
"Counter target spell with mana value 1 or less."
Thoughtbind76%
$0.05↓#29397↓0.33↓21.9 years↓
"Counter target spell with mana value 4 or less."
Sound the Trumpets76%
$0.14↑#21217↓0.00↓0.1 years↓
"Counter target spell. If that spell's mana value was 2 or less, recruit."
Disruption Protocol76%
$0.27↑#6490↑0.35↓4.5 years↓
"Counter target spell."
Spell Swindle74%
$1.49↑#3178↑0.43↓8.9 years↓
"Counter target spell. Create X Treasure tokens, where X is that spell's mana value."
Neutralize74%
$0.17↑#7139↑0.59↓6.4 years↓
"Counter target spell."
Wash Away74%
$0.38↑#2894↑0.46↓4.8 years↓
"Counter target spell [that wasn't cast from its owner's hand]."
Mental Misstep74%
$5.90↑#462↑0.7915.3 years↓
"Counter target spell with mana value 1."
Mystic Genesis74%
$0.17↑#185870.00↓13.6 years↓
"Counter target spell. Create an X/X green Ooze creature token, where X is that spell's mana value."
Draining Whelk74%
$0.39↑#13168↑0.14↓19.9 years↓
"When this creature enters, counter target spell. Put X +1/+1 counters on this creature, where X is that spell's mana value."
Sinister Sabotage74%
$0.20↑#6377↑0.36↓7.9 years↓
"Counter target spell."