Frightful Delusion 
Instant
$0.08 #26368 0.27 15.1 years
Counter target spell unless its controller pays 
. That player discards a card.
. That player discards a card.Click a line or tag to filter
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Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Clash of Wills90%
$0.20↑#12412↑0.2911.3 years↓
"Counter target spell unless its controller pays 
."
."
Quench90%
$0.16↑#13312↑0.12↓7.7 years↓
"Counter target spell unless its controller pays ."
."
Runeboggle88%
$0.05↓#264040.47↑20.7 years↑
"Counter target spell unless its controller pays ."
."
Mana Tithe86%
$0.80↑#2142↑0.62↑19.7 years↑
"Counter target spell unless its controller pays ."
."
Mindswipe86%
$0.33↑#14900↑0.13↓12.1 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."
Soul Read85%
$0.22↑#16107↑0.14↓3.9 years↓
"• Counter target spell unless its controller pays 
."
."
It'll Quench Ya!84%
$0.23↑#3673↑0.270.9 years↓
"Counter target spell unless its controller pays ."
."
Overrule84%
$0.15↑#213000.10↓20.5 years↑
"Counter target spell unless its controller pays . You gain X life."
. You gain X life."
Offering to Asha84%
$0.07↓#264560.00↓17.5 years↑
"Counter target spell unless its controller pays . You gain 4 life."
. You gain 4 life."
Revolutionary Rebuff84%
$0.11↑#223590.1910.1 years↓
"Counter target nonartifact spell unless its controller pays ."
."
Perplex83%
$1.63↑#5176↑0.45↑21.0 years↑
"Counter target spell unless its controller discards their hand."
Force Spike82%
$0.97↑#13332↑0.3332.4 years↑
"Counter target spell unless its controller pays ."
."
Deception82%
$2.66↑#297960.57↑27.5 years↑
"Target opponent discards two cards."
Censor81%
$0.20↑#13500↑0.10↓9.5 years↓
"Counter target spell unless its controller pays ."
."
Spell Snip81%
$0.12↑#273870.14↓18.0 years↑
"Counter target spell unless its controller pays ."
."
Spectral Denial81%
$0.35↑#7953↑0.00↓1.5 years↓
"Counter target spell unless its controller pays ."
."
Complicate81%
$0.23↑#13659↑0.00↓24.0 years↑
"Counter target spell unless its controller pays 
."
."
Rethink81%
$0.13↑#233540.43↑26.4 years↑
"Counter target spell unless its controller pays , where X is its mana value."
, where X is its mana value."
Mystical Dispute80%
$0.37↑#10856↑0.00↓7.0 years↓
"Counter target spell unless its controller pays ."
."
Thassa's Intervention80%
$0.35↑#7202↑0.11↓6.7 years↓
"• Counter target spell unless its controller pays twice ."
."