Repulsive Mutation 
Instant
$0.64 #2788 0.32 2.6 years
Put X +1/+1 counters on target creature you control. Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control.
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Spell Rupture94%
$0.14↓#11486↓0.11↓13.6 years↑
"Counter target spell unless its controller pays , where X is the greatest power among creatures you control."
, where X is the greatest power among creatures you control."
Clash of Wills86%
$0.15↓#12548↓0.22↓11.1 years↑
"Counter target spell unless its controller pays ."
."
Quench86%
$0.20↓#13076↓0.18↓7.6 years↑
"Counter target spell unless its controller pays 
."
."
Runeboggle82%
$0.04↓#26362↓0.12↓20.6 years↑
"Counter target spell unless its controller pays 
."
."
Overrule80%
$0.17↓#21095↓0.50↑20.3 years↑
"Counter target spell unless its controller pays . You gain X life."
. You gain X life."
Offering to Asha80%
$0.09↓#26250↓0.2417.3 years↑
"Counter target spell unless its controller pays 
. You gain 4 life."
. You gain 4 life."
Mana Tithe79%
$0.78↑#2148↑0.47↑19.6 years↑
"Counter target spell unless its controller pays ."
."
Mindswipe79%
$0.36↓#14660↓0.2911.9 years↑
"Counter target spell unless its controller pays . this card deals X damage to that spell's controller."
. this card deals X damage to that spell's controller."
Revolutionary Rebuff79%
$0.11↓#22085↓0.409.9 years↑
"Counter target nonartifact spell unless its controller pays ."
."
It'll Quench Ya!78%
$0.27↓#3783↓0.00↓0.8 years↓
"Counter target spell unless its controller pays ."
."
Rethink78%
$0.10↓#23000↓0.3826.3 years↑
"Counter target spell unless its controller pays , where X is its mana value."
, where X is its mana value."
Lose Focus78%
$0.26↓#10289↓0.50↑5.2 years↑
"Counter target spell unless its controller pays ."
."
Soul Read78%
$0.15↓#15849↓0.12↓3.8 years↑
"• Counter target spell unless its controller pays ."
."
Spectral Denial77%
$0.35↓#8127↓0.261.4 years↓
"Counter target spell unless its controller pays ."
."
Mystic Confluence77%
$0.52↓#1453↑0.3410.8 years↑
"• Counter target spell unless its controller pays 
."
."
Force Spike76%
$0.91↑#13278↓0.79↑32.3 years↑
"Counter target spell unless its controller pays ."
."
Reasonable Doubt76%
$0.14↓#16384↓0.292.6 years
"Counter target spell unless its controller pays ."
."
Crush Dissent76%
$0.11↓#18256↓0.94↑7.3 years↑
"Counter target spell unless its controller pays ."
."
Thassa's Intervention76%
$0.41↓#7149↓0.21↓6.6 years↑
"• Counter target spell unless its controller pays twice ."
."
Spell Syphon76%
$0.11↓#20440↓0.2918.3 years↑
"Counter target spell unless its controller pays for each blue permanent you control."
for each blue permanent you control."