Merfolk Trickster 
Creature — Merfolk Wizard
$0.25 #9781 0.44 8.4 years
Flash
When this creature enters, tap target creature an opponent controls. It loses all abilities until end of turn.
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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.
The Wondrous Wasp98%
$1.30↑#13995↓0.00↓0.2 years↓
"When this card enters, tap up to one target creature. It loses all abilities for as long as this card remains on the battlefield."
+1 more matching line
Ray of Frost92%
$0.11↓#23555↓0.57↑5.1 years↓
"Flash"
Utter Insignificance88%
$0.24↓#6992↑0.28↓2.2 years↓
"Flash"
Chrome Prowler88%
$0.17↓#19748↓0.12↓3.6 years↓
"When this creature enters, tap target creature an opponent controls."
+1 more matching line
Heavy Infantry88%
$0.01↓#30138↓0.29↓11.1 years↑
"When this creature enters, tap target creature an opponent controls."
Glaring Aegis88%
$0.07↓#17739↓0.00↓11.4 years↑
"When this Aura enters, tap target creature an opponent controls."
Tempest Caller87%
$0.26↑#94880.478.9 years
"When this creature enters, tap all creatures target opponent controls."
Leonin Snarecaster87%
$0.05↓#24501↓0.06↓12.9 years↑
"When this creature enters, you may tap target creature."
Somnomancer87%
$0.13↓#30581↓0.00↓18.3 years↑
"When this creature enters, you may tap target creature."
Mystic Subdual87%
$0.12↓#16004↓0.31↓6.4 years↓
"Flash"
Niblis of the Mist85%
$0.18↓#28236↓0.33↓14.6 years↑
"When this creature enters, you may tap target creature."
Noggle the Mind85%
$0.28↑#112780.00↓0.6 years↓
"Flash"
Thundermare82%
$0.89↑#18811↓0.14↓29.3 years↑
"When this creature enters, tap all other creatures."
Shrieking Mogg82%
$0.52↑#25118↓0.88↑26.6 years↑
"When this creature enters, tap all other creatures."
Subjugator Angel82%
$0.30↑#95070.62↑10.1 years↑
"When this creature enters, tap all creatures your opponents control."
Amphibian Downpour82%
$1.84↑#1227↑0.79↑2.2 years↓
"Flash"
Intrusive Packbeast81%
$0.03↓#29797↓0.00↓7.9 years
"When this creature enters, tap up to two target creatures your opponents control."
Tishana's Tidebinder80%
$1.98↑#2768↑0.522.8 years↓
"Flash"
Capture Sphere80%
$0.05↓#18702↓0.25↓7.9 years
"Flash"
Sentinel of the Eternal Watch80%
$0.12↓#16982↓0.06↓11.1 years↑
"At the beginning of combat on each opponent's turn, tap target creature that player controls."