Unified Will 
Instant
$0.18 #18425 0.12 16.4 years
Counter target spell if you control more creatures than that spell's controller.
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Outwit83%
$0.07↓#23869↓0.1814.3 years↓
"Counter target spell that targets a player."
Cancel82%
$0.06↓#2057↑0.29↑19.9 years↑
"Counter target spell."
Confound78%
$0.18#11856↑0.00↓25.6 years↑
"Counter target spell that targets a creature."
Thoughtbind77%
$0.05↓#29397↓0.33↑21.9 years↑
"Counter target spell with mana value 4 or less."
Minor Misstep76%
$0.17↓#14720↑1.00↑3.6 years↓
"Counter target spell with mana value 1 or less."
Double Negative76%
$0.27↑#209500.0917.3 years
"Counter up to two target spells."
Contradict76%
$0.06↓#194870.00↓11.4 years↓
"Counter target spell."
Frilled Mystic76%
$0.19↑#7189↑0.56↑7.6 years↓
"When this creature enters, you may counter target spell."
Out of Air75%
$0.20↑#13810↑0.53↑2.8 years↓
"Counter target spell."
Ertai's Scorn75%
$0.27↑#9323↑0.174.0 years↓
"Counter target spell."
Deny the Witch75%
$0.93↑#9611↑0.203.9 years↓
"Counter target spell, activated ability, or triggered ability. Its controller loses life equal to the number of creatures you control."
Congregate75%
$0.14↓#5332↑0.0627.9 years↑
"Target player gains 2 life for each creature on the battlefield."
Frazzle75%
$0.13↓#29954↓0.1120.6 years↑
"Counter target nonblue spell."
Protect the Negotiators74%
$0.25↑#11807↑0.22↑4.0 years↓
"Counter target spell unless its controller pays for each creature you control."
for each creature you control."
Fall of the Gavel74%
$0.13↓#24691↓0.29↑13.9 years↓
"Counter target spell. You gain 5 life."
Vex74%
$0.06↓#24571↓0.30↑22.6 years↑
"Counter target spell. That spell's controller may draw a card."
Absorb74%
$0.35↑#3709↑0.30↑25.9 years↑
"Counter target spell. You gain 3 life."
Last Word72%
$0.65↑#186970.67↑22.6 years↑
"Counter target spell."
Familiar's Ruse72%
$0.36↑#6971↑0.1218.9 years↑
"Counter target spell."
Intervene72%
$0.37↑#157890.50↑27.6 years↑
"Counter target spell that targets a creature."