Gadwick, the Wizened 



Legendary Creature — Human Wizard
$0.35 #6651 0.76 7.0 years
When Gadwick enters, draw X cards.
Whenever you cast a blue spell, tap target nonland permanent an opponent controls.
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Cards similar to Gadwick, the Wizened 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.
Stinging Lionfish78%
$0.14↓#14319↓0.18↓6.7 years
"Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent."
Iceman and Firestar76%
$0.30↓#25440↓0.47↓0.3 years↓
"Whenever you cast a blue spell, tap up to one target creature."
Mysterious Tome // Chilling Chronicle74%
$0.23↓#20269↓0.11↓5.1 years↓
"
,
: Tap target nonland permanent. Transform this artifact."
Tamiyo, Field Researcher73%
$0.82↑#2810↑0.47↓10.2 years↑
"−2: Tap up to two target nonland permanents. They don't untap during their controller's next untap step."
Treacherous Blessing72%
$0.37↑#10360↓0.00↓6.7 years
"When this enchantment enters, draw three cards."
+1 more matching line
Tiller Engine72%
$18.37↑#3315↑0.50↓4.1 years↓
"• Tap target nonland permanent an opponent controls."