Repulsive Mutation 
Instant
$0.71 #2802 0.17 2.7 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%
$0.16↓#11658↓0.2513.7 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%
$0.20↓#12412↓0.29↑11.3 years↑
"Counter target spell unless its controller pays ."
."
Quench86%
$0.16↓#13312↓0.127.7 years↑
"Counter target spell unless its controller pays 
."
."
Runeboggle82%
$0.05↓#26404↓0.47↑20.7 years↑
"Counter target spell unless its controller pays 
."
."
Overrule81%
$0.15↓#21300↓0.1020.5 years↑
"Counter target spell unless its controller pays . You gain X life."
. You gain X life."
Offering to Asha80%
$0.07↓#26456↓0.00↓17.5 years↑
"Counter target spell unless its controller pays 
. You gain 4 life."
. You gain 4 life."
Mana Tithe80%
$0.80↑#2142↑0.62↑19.7 years↑
"Counter target spell unless its controller pays ."
."
It'll Quench Ya!79%
$0.23↓#3673↓0.27↑0.9 years↓
"Counter target spell unless its controller pays ."
."
Mindswipe79%
$0.33↓#14900↓0.1312.1 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↓#22359↓0.1910.1 years↑
"Counter target nonartifact spell unless its controller pays ."
."
Rethink78%
$0.13↓#23354↓0.43↑26.4 years↑
"Counter target spell unless its controller pays , where X is its mana value."
, where X is its mana value."
Soul Read78%
$0.22↓#16107↓0.143.9 years↑
"• Counter target spell unless its controller pays ."
."
Quandrix Charm78%
$0.20↓#7359↓0.210.5 years↓
"• Counter target spell unless its controller pays ."
."
Spectral Denial77%
$0.35↓#7953↓0.00↓1.5 years↓
"Counter target spell unless its controller pays ."
."
Lose Focus77%
$0.30↓#10444↓0.75↑5.3 years↑
"Counter target spell unless its controller pays ."
."
Mystic Confluence77%
$0.47↓#1476↑0.44↑10.9 years↑
"• Counter target spell unless its controller pays 
."
."
Force Spike76%
$0.97↑#13332↓0.33↑32.4 years↑
"Counter target spell unless its controller pays ."
."
Reasonable Doubt76%
$0.18↓#16697↓0.07↓2.7 years
"Counter target spell unless its controller pays ."
."
Crush Dissent76%
$0.14↓#18400↓0.177.5 years↑
"Counter target spell unless its controller pays ."
."
Thassa's Intervention76%
$0.35↓#7202↓0.116.7 years↑
"• Counter target spell unless its controller pays twice ."
."