Nath's Elite {4}{G}
Creature — Elf Warrior
All creatures able to block this creature do so.
When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)
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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.
Adder-Staff Boggart 100%
$0.12#26319
"When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature."
Paperfin Rascal 100%
$0.26#16352
"When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature."
Bog Hoodlums 100%
$0.10#21230
"When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature."
+1 more matching line
Oaken Brawler 100%
$0.16#27910
"When this creature enters, clash with an opponent. If you win, put a +1/+1 counter on this creature."
Stone-Tongue Basilisk 85%
$0.42#25875
"As long as there are seven or more cards in your graveyard, all creatures able to block this creature do so."
Noble Quarry 83%
$0.30#15088
"All creatures able to block this creature or enchanted creature do so."
Silumgar Assassin 82%
$0.31#10647
"Creatures with power greater than this creature's power can't block it."