Gadwick, the Wizened 



Legendary Creature — Human Wizard
$0.37 #6493 0.53 6.9 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%
$0.12↓#14209↓0.19↓6.6 years
"Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent."
Iceman and Firestar76%
$0.32↓#26224↓0.00↓0.2 years↓
"Whenever you cast a blue spell, tap up to one target creature."
Mysterious Tome // Chilling Chronicle74%
$0.17↓#19937↓0.07↓4.9 years↓
"
,
: Tap target nonland permanent. Transform this artifact."
Tamiyo, Field Researcher73%
$0.60↑#2997↑0.4710.1 years↑
"−2: Tap up to two target nonland permanents. They don't untap during their controller's next untap step."
Treacherous Blessing72%
$0.37#10133↓0.21↓6.6 years
"When this enchantment enters, draw three cards."
+1 more matching line