Obscura Charm 
Instant
$0.22 #8540 0.29 4.4 years
Choose one —
• Return target multicolored permanent card with mana value 3 or less from your graveyard to the battlefield tapped.
• Counter target instant or sorcery spell.
• Destroy target creature or planeswalker with mana value 3 or less.
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Cards similar to Obscura Charm 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.
Bant Charm82%
$0.28↑#4974↑0.39↑17.9 years↑
"• Counter target instant spell."
+2 more matching lines
Muddle the Mixture82%
$1.84↑#694↑0.44↑20.9 years↑
"Counter target instant or sorcery spell."
Extinguish82%
$0.25↑#27936↓0.60↑28.2 years↑
"Counter target sorcery spell."
Envelop82%
$3.31↑#20582↓0.60↑24.3 years↑
"Counter target sorcery spell."
Miscast81%
$1.20↑#2696↑0.316.2 years↑
"Counter target instant or sorcery spell unless its controller pays 
."
."
Psychic Rebuttal80%
$0.20↓#20057↓0.1911.1 years↑
"Counter target instant or sorcery spell that targets you."
Dispel80%
$0.28↑#919↑0.3316.6 years↑
"Counter target instant spell."
Molten Influence79%
$7.84↑#17581↓0.91↑24.9 years↑
"Counter target instant or sorcery spell unless its controller has this card deal 4 damage to them."
Sister of Silence78%
$0.41↑#12746↓0.61↑3.9 years
"When this creature enters, counter target instant spell, sorcery spell, activated ability, or triggered ability."
Stratus Dancer78%
$0.25↑#81990.73↑11.4 years↑
"When this creature is turned face up, counter target instant or sorcery spell."
Flusterstorm78%
$4.99↑#307↑0.70↑15.2 years↑
"Counter target instant or sorcery spell unless its controller pays 
."
."
Spider-Sense76%
$0.99↑#3024↑0.65↑1.0 years↓
"Counter target instant spell, sorcery spell, or triggered ability."
Disrupt76%
$0.27↑#102160.43↑29.2 years↑
"Counter target instant or sorcery spell unless its controller pays ."
."
Dimir Charm76%
$0.27↑#99730.57↑13.7 years↑
"• Counter target sorcery spell."
+2 more matching lines
Flash Counter76%
$0.22#18124↓0.05↓32.3 years↑
"Counter target instant spell."
Unyaro Griffin76%
$0.22#24244↓0.14↓29.9 years↑
"Sacrifice this creature: Counter target red instant or sorcery spell."
Warping Wail75%
$0.48↑#2050↑0.1910.6 years↑
"• Counter target sorcery spell."
+1 more matching line
Dreadbore75%
$0.37↑#4477↑0.3513.9 years↑
"Destroy target creature or planeswalker."
Hero's Downfall75%
$0.14↓#1970↑0.16↓12.9 years↑
"Destroy target creature or planeswalker."
Finishing Blow75%
$0.13↓#24151↓0.12↓6.2 years↑
"Destroy target creature or planeswalker."