Fangkeeper's Familiar 
Creature — Snake
$0.22 #10933 0.28 1.4 years
Flash
When this creature enters, choose one —
• You gain 3 life and surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
• Destroy target enchantment.
• Counter target creature spell.
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Cards similar to Fangkeeper's Familiar 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.
Unforgiving Aim87%
$0.18↓#117270.00↓0.6 years
"• Destroy target enchantment."
+1 more matching line
Return to Nature86%
$0.17↓#757↑0.17↓7.3 years↑
"• Destroy target enchantment."
+1 more matching line
Hull Breach86%
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"• Destroy target enchantment."
+1 more matching line
Heritage Reclamation84%
$0.40↑#2674↑0.17↓1.4 years
"• Destroy target enchantment."
+1 more matching line
Pawpatch Formation84%
$0.36↑#4415↑0.212.1 years
"• Destroy target enchantment."
+1 more matching line
Preemptive Strike84%
$6.34↑#28822↓0.2927.3 years↑
"Counter target creature spell."
False Summoning84%
$0.21↓#24689↓0.56↑28.2 years↑
"Counter target creature spell."
Essence Scatter84%
$0.07↓#2719↑0.2817.1 years↑
"Counter target creature spell."
Doctor Spectrum84%
$0.27↑#26870↓0.00↓0.2 years↓
"• Destroy target enchantment."
+1 more matching line
Break Ties83%
$0.16↓#15683↓0.18↓5.2 years↑
"• Destroy target enchantment."
+1 more matching line
Thraben Charm83%
$0.42↑#3189↑0.17↓2.2 years
"• Destroy target enchantment."
+1 more matching line
Spellgyre82%
$0.18↓#8079↑0.00↓2.1 years
"• Counter target spell."
+2 more matching lines
Ojutai's Command82%
$0.33↑#15269↓0.06↓11.4 years↑
"• Counter target creature spell."
+1 more matching line
Bone to Ash80%
$0.05↓#13927↓0.2014.6 years↑
"Counter target creature spell."
Exclude80%
$0.16↓#92820.00↓25.9 years↑
"Counter target creature spell."
Soul Manipulation80%
$0.22#8184↑0.86↑17.3 years↑
"• Counter target creature spell."
Deadly Visit80%
$0.07↓#23885↓0.00↓7.9 years↑
"Surveil 2."
+1 more matching line
Charming Scoundrel80%
$0.58↑#3442↑0.12↓3.0 years↑
"When this creature enters, choose one —"
Lord Skitter's Butcher80%
$0.34↑#5303↑0.14↓3.0 years↑
"When this creature enters, choose one —"
Aether Channeler80%
$0.35↑#1545↑0.18↓4.0 years↑
"When this creature enters, choose one —"