Invasion of New Phyrexia // Teferi Akosa of Zhalfir
Battle — Siege // Legendary Planeswalker — Teferi
(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, create X 2/2 white and blue Knight creature tokens with vigilance.
+1: Draw two cards. Then discard two cards unless you discard a creature card.
−2: You get an emblem with "Knights you control get +1/+0 and have ward {1}."
−3: Tap any number of untapped creatures you control. When you do, shuffle target nonland permanent an opponent controls with mana value X or less into its owner's library, where X is the number of creatures tapped this way.
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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.
Tezzeret, Betrayer of Flesh 100%
$0.43#3819
"+1: Draw two cards. Then discard two cards unless you discard an artifact card."
Oko, the Ringleader 99%
$0.40#11533
"+1: Draw two cards. If you've committed a crime this turn, discard a card. Otherwise, discard two cards."
Invasion of Belenon // Belenon War Anthem 88%
$0.21#15718
"When this Siege enters, create a 2/2 white and blue Knight creature token with vigilance."