Louisoix's Sacrifice 
Instant
$0.34 #6183 0.29 1.2 years
As an additional cost to cast this spell, sacrifice a legendary creature or pay 
.
.Counter target activated ability, triggered ability, or noncreature spell.
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Bayou Groff84%
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"As an additional cost to cast this spell, sacrifice a creature or pay 
."
."
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$0.06↓#20823↓0.364.9 years↑
"As an additional cost to cast this spell, sacrifice a creature or pay 
."
."
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$9.53↑#4588↑0.77↑23.3 years↑
"Counter target activated or triggered ability."
Lash of the Balrog82%
$0.13↓#72780.303.2 years↑
"As an additional cost to cast this spell, sacrifice a creature or pay 
."
."
Negate80%
$0.15↓#56↑0.40↑18.6 years↑
"Counter target noncreature spell."
Spark Harvest80%
$0.15↓#11594↓0.257.3 years↑
"As an additional cost to cast this spell, sacrifice a creature or pay ."
."
Disallow80%
$0.41↑#1819↑0.45↑9.6 years↑
"Counter target spell, activated ability, or triggered ability."
Eaten Alive79%
$0.13↓#3167↑0.204.9 years↑
"As an additional cost to cast this spell, sacrifice a creature or pay ."
."
Emerald Dragon // Dissonant Wave78%
$0.23↓#9870↓0.00↓4.2 years↑
"Counter target activated or triggered ability from a noncreature source."
Bind78%
$5.13↑#15301↓0.00↓25.9 years↑
"Counter target activated ability."
Scatter Arc78%
$0.11↓#21561↓0.2013.6 years↑
"Counter target noncreature spell."
Repudiate // Replicate77%
$0.34#9248↓0.50↑7.6 years↑
"Counter target activated or triggered ability."
Voidslime76%
$0.32↓#4511↑0.2520.3 years↑
"Counter target spell, activated ability, or triggered ability."
Dovin's Veto76%
$2.15↑#239↑0.70↑7.3 years↑
"Counter target noncreature spell."
Squelch74%
$0.26↓#22228↓0.41↑21.9 years↑
"Counter target activated ability."
Stir Up Trouble74%
$0.17↓#18617↓0.00↓0.1 years↓
"As an additional cost to cast this spell, sacrifice an artifact or creature or pay ."
."
Deadly Precision73%
$0.16↓#11120↓0.00↓0.8 years
"As an additional cost to cast this spell, pay or sacrifice an artifact or creature."
or sacrifice an artifact or creature."
Brokers Confluence72%
$1.42↑#10009↓0.55↑4.4 years↑
"• Counter target activated or triggered ability."
Betrayer's Bargain72%
$0.15↓#17761↓0.12↓1.9 years
"As an additional cost to cast this spell, sacrifice a creature or enchantment or pay ."
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$0.06↓#20690↓0.2425.9 years↑
"Counter target noncreature spell."