Urza, Powerstone Prodigy {2}{U}
Legendary Creature — Human Artificer
Vigilance
{1}, {T}: Draw a card, then discard a card.
Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn. (The token is an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
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Cards that do something similar 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.
Conqueror's Galleon // Conqueror's Foothold 99%
$0.76#8371
"{2}, {T}: Draw a card, then discard a card."
Collector's Vault 98%
$0.93#1772
"{2}, {T}: Draw a card, then discard a card. Create a Treasure token."
Daily Bugle Newspaper 98%
$0.31#20632
"{2}, {T}: Draw a card, then discard a card. Create a Treasure token."
Evie Frye 97%
$0.34#6424
"{1}, {T}: Draw a card, then discard a card. When you discard a creature card this way, target creature you control can't be blocked this turn."
Mary Read and Anne Bonny 85%
$0.40#5109
"{T}: Draw a card, then discard a card."
+1 more matching line
Kitsa, Otterball Elite 85%
$4.03#2184
"{T}: Draw a card, then discard a card."
+1 more matching line