Tezzeret, Betrayer of Flesh {2}{U}{U}
Legendary Planeswalker — Tezzeret
The first activated ability of an artifact you activate each turn costs {2} less to activate.
+1: Draw two cards. Then discard two cards unless you discard an artifact card.
−2: Target artifact becomes an artifact creature. If it isn't a Vehicle, it has base power and toughness 4/4.
−6: You get an emblem with "Whenever an artifact you control becomes tapped, draw a card."
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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.
Invasion of New Phyrexia // Teferi Akosa of Zhalfir 100%
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"+1: Draw two cards. Then discard two cards unless you discard a creature card."
Oko, the Ringleader 99%
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"+1: Draw two cards. If you've committed a crime this turn, discard a card. Otherwise, discard two cards."
+1 more matching line
Artificer Class 84%
$15.06#4038
"The first artifact spell you cast each turn costs {1} less to cast."
Forensic Gadgeteer 82%
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"Activated abilities of artifacts you control cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana."
+1 more matching line
Armor Wars 82%
$0.31#16424
"Artifact spells you cast this turn cost {1} less to cast."
+1 more matching line