Spell Snip 
Instant
$0.12 #27124 0.45 17.9 years
Counter target spell unless its controller pays 
.
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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.
Censor100%
$0.21↑#13352↑0.56↑9.4 years↓
"Counter target spell unless its controller pays ."
."+1 more matching line
Complicate99%
$0.26↑#13481↑0.33↓23.9 years↑
"Counter target spell unless its controller pays 
."
."+1 more matching line
Mana Tithe98%
$0.78↑#2148↑0.4719.6 years↑
"Counter target spell unless its controller pays ."
."
It'll Quench Ya!97%
$0.27↑#3783↑0.00↓0.8 years↓
"Counter target spell unless its controller pays ."
."
Miscalculation96%
$0.29↑#11239↑0.3827.6 years↑
"Counter target spell unless its controller pays ."
."+1 more matching line
Jwari Disruption // Jwari Ruins96%
$0.48↑#2682↑0.26↓5.9 years↓
"Counter target spell unless its controller pays ."
."
Logic Knot93%
$0.18↑#12706↑0.00↓19.3 years↑
"Counter target spell unless its controller pays 
."
."
Clash of Wills92%
$0.15↑#12548↑0.22↓11.1 years↓
"Counter target spell unless its controller pays ."
."
Quench92%
$0.20↑#13076↑0.18↓7.6 years↓
"Counter target spell unless its controller pays ."
."
Hindering Touch92%
$0.09↓#226980.29↓23.3 years↑
"Counter target spell unless its controller pays ."
."
Metallic Rebuke92%
$0.27↑#10930↑0.17↓9.6 years↓
"Counter target spell unless its controller pays ."
."
Lookout's Dispersal92%
$0.24↑#10542↑0.408.9 years↓
"Counter target spell unless its controller pays 
."
."
Reasonable Doubt91%
$0.14↑#16384↑0.29↓2.6 years↓
"Counter target spell unless its controller pays ."
."
Evasive Action91%
$0.23↑#17931↑0.07↓25.3 years↑
"Counter target spell unless its controller pays for each basic land type among lands you control."
for each basic land type among lands you control."
Countervailing Winds91%
$0.23↑#9055↑0.14↓9.1 years↓
"Counter target spell unless its controller pays for each card in your graveyard."
for each card in your graveyard."+1 more matching line
Runeboggle90%
$0.04↓#263620.12↓20.6 years↑
"Counter target spell unless its controller pays ."
."
Make Disappear90%
$0.16↑#14972↑0.12↓4.4 years↓
"Counter target spell unless its controller pays ."
."
Crush Dissent90%
$0.11↓#18256↑0.94↑7.3 years↓
"Counter target spell unless its controller pays ."
."
Geistlight Snare90%
$0.22↑#16318↑0.08↓4.8 years↓
"Counter target spell unless its controller pays ."
."
Thassa's Rebuff90%
$0.34↑#14984↑0.4312.6 years↓
"Counter target spell unless its controller pays , where X is your devotion to blue."
, where X is your devotion to blue."