Obscura Charm 
Instant
$0.22 #8775 0.00 4.5 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%
$0.30↑#5092↑0.25↑18.0 years↑
"• Counter target instant spell."
+2 more matching lines
Muddle the Mixture82%
$2.04↑#710↑0.49↑21.0 years↑
"Counter target instant or sorcery spell."
Envelop82%
$3.92↑#20851↓0.0624.4 years↑
"Counter target sorcery spell."
Extinguish82%
$0.25↑#28185↓0.32↑28.3 years↑
"Counter target sorcery spell."
Miscast81%
$1.41↑#2838↑0.41↑6.3 years↑
"Counter target instant or sorcery spell unless its controller pays 
."
."
Psychic Rebuttal80%
$0.22#20105↓0.19↑11.3 years↑
"Counter target instant or sorcery spell that targets you."
Dispel80%
$0.32↑#953↑0.33↑16.7 years↑
"Counter target instant spell."
Molten Influence79%
$8.77↑#17668↓0.21↑25.1 years↑
"Counter target instant or sorcery spell unless its controller has this card deal 4 damage to them."
Sister of Silence78%
$0.41↑#12962↓0.004.0 years
"When this creature enters, counter target instant spell, sorcery spell, activated ability, or triggered ability."
Flusterstorm78%
$4.88↑#308↑0.78↑15.3 years↑
"Counter target instant or sorcery spell unless its controller pays 
."
."
Stratus Dancer78%
$0.27↑#84850.11↑11.6 years↑
"When this creature is turned face up, counter target instant or sorcery spell."
Disrupt76%
$0.23↑#102480.11↑29.4 years↑
"Counter target instant or sorcery spell unless its controller pays ."
."
Dimir Charm76%
$0.25↑#101280.0613.8 years↑
"• Counter target sorcery spell."
+2 more matching lines
Spider-Sense76%
$1.02↑#2842↑0.33↑1.1 years↓
"Counter target instant spell, sorcery spell, or triggered ability."
Unyaro Griffin76%
$0.21↓#24680↓0.0530.0 years↑
"Sacrifice this creature: Counter target red instant or sorcery spell."
Flash Counter76%
$0.29↑#18342↓0.29↑32.4 years↑
"Counter target instant spell."
Warping Wail75%
$0.45↑#1995↑0.16↑10.7 years↑
"• Counter target sorcery spell."
+1 more matching line
Dreadbore75%
$0.40↑#4615↑0.18↑14.0 years↑
"Destroy target creature or planeswalker."
Hero's Downfall75%
$0.17↓#1997↑0.0813.1 years↑
"Destroy target creature or planeswalker."
Finishing Blow75%
$0.14↓#24449↓0.006.3 years↑
"Destroy target creature or planeswalker."