Runeboggle 
Instant
$0.05 #26404 0.47 20.7 years
Counter target spell unless its controller pays 
.
.Draw a card.
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Cards similar to Runeboggle expected a card that isn't here?
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 Wills97%
$0.20↑#12412↑0.29↓11.3 years↓
"Counter target spell unless its controller pays 
."
."
Quench97%
$0.16↑#13312↑0.12↓7.7 years↓
"Counter target spell unless its controller pays ."
."
Confound94%
$0.19↑#11916↑0.12↓25.7 years↑
"Draw a card."
+1 more matching line
Soul Read93%
$0.22↑#16107↑0.14↓3.9 years↓
"• Counter target spell unless its controller pays 
."
."
Mana Tithe92%
$0.80↑#2142↑0.62↑19.7 years
"Counter target spell unless its controller pays ."
."
It'll Quench Ya!92%
$0.23↑#3673↑0.27↓0.9 years↓
"Counter target spell unless its controller pays ."
."
Mindswipe92%
$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."
Complicate91%
$0.23↑#13659↑0.00↓24.0 years↑
"Counter target spell unless its controller pays 
."
."
Overrule91%
$0.15↑#213000.10↓20.5 years
"Counter target spell unless its controller pays . You gain X life."
. You gain X life."
Revolutionary Rebuff91%
$0.11↑#223590.19↓10.1 years↓
"Counter target nonartifact spell unless its controller pays ."
."
Censor90%
$0.20↑#13500↑0.10↓9.5 years↓
"Counter target spell unless its controller pays ."
."
Spell Snip90%
$0.12↑#273870.14↓18.0 years↓
"Counter target spell unless its controller pays ."
."
Offering to Asha90%
$0.07↑#264560.00↓17.5 years↓
"Counter target spell unless its controller pays . You gain 4 life."
. You gain 4 life."
Keep Safe90%
$0.28↑#5869↑0.12↓6.5 years↓
"Draw a card."
+1 more matching line
Rethink90%
$0.13↑#233540.4326.4 years↑
"Counter target spell unless its controller pays , where X is its mana value."
, where X is its mana value."
Grip of Amnesia90%
$0.25↑#19815↑0.4124.4 years↑
"Draw a card."
+1 more matching line
Eyes of Gitaxias90%
$0.11↑#20930↑0.00↓3.5 years↓
"Draw a card."
Contentious Plan90%
$0.37↑#2198↑0.14↓7.5 years↓
"Draw a card."
Steady Progress90%
$0.26↑#5093↑0.06↓16.1 years↓
"Draw a card."
Force Spike89%
$0.97↑#13332↑0.33↓32.4 years↑
"Counter target spell unless its controller pays ."
."