Thought Collapse 
Instant
$0.27 #5861 0.44 7.7 years
Counter target spell. Its controller mills three cards.
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Psychic Strike100%
$0.33↑#9231↓0.26↓13.7 years↑
"Counter target spell. Its controller mills two cards."
Countermand100%
$0.07↓#14395↓0.20↓12.5 years↑
"Counter target spell. Its controller mills four cards."
Didn't Say Please96%
$0.34↑#3545↑0.31↓7.0 years
"Counter target spell. Its controller mills three cards."
Tome Scour89%
$0.14↓#11899↓0.07↓17.3 years↑
"Target player mills five cards."
Glimpse the Unthinkable88%
$3.35↑#50600.4021.0 years↑
"Target player mills ten cards."
Thought Scour86%
$0.40↑#1801↑0.12↓14.7 years↑
"Target player mills two cards."
Compelling Argument84%
$0.20↓#16513↓0.06↓9.5 years↑
"Target player mills five cards."
Merfolk Secretkeeper // Venture Deeper83%
$0.25↓#13449↓0.05↓7.0 years
"Target player mills four cards."
Outwit82%
$0.06↓#24186↓0.18↓14.5 years↑
"Counter target spell that targets a player."
Returned Centaur82%
$0.05↓#21613↓0.19↓13.1 years↑
"When this creature enters, target player mills four cards."
Homarid Explorer82%
$0.08↓#24305↓0.07↓8.5 years
"When this creature enters, target player mills four cards."
Dampen Thought82%
$0.13↓#22405↓0.07↓22.1 years↑
"Target player mills four cards."
Merrow Witsniper82%
$0.28↑#26503↓0.18↓18.7 years↑
"When this creature enters, target player mills a card."
Induce Paranoia82%
$0.24↓#21706↓0.21↓21.0 years↑
"Counter target spell. If 
was spent to cast this spell, that spell's controller mills X cards, where X is the spell's mana value."
was spent to cast this spell, that spell's controller mills X cards, where X is the spell's mana value."
Wall of Lost Thoughts82%
$0.17↓#14226↓0.25↓7.7 years
"When this creature enters, target player mills four cards."
Brain Freeze81%
$1.79↑#776↑1.06↑23.4 years↑
"Target player mills three cards."
Cancel81%
$0.07↓#2087↑0.31↓20.0 years↑
"Counter target spell."
Ray of Erasure80%
$0.20↓#21688↓0.12↓31.4 years↑
"Target player mills a card."
Desperate Bloodseeker80%
$0.21↓#14650↓0.05↓2.5 years↓
"When this creature enters, target player mills two cards."
Pilfered Plans80%
$0.10↓#9764↓0.07↓13.5 years↑
"Target player mills two cards. Draw two cards."