Shadow Urchin {2}{B/R}
Creature — Ouphe
Whenever this creature attacks, blight 1. (Put a -1/-1 counter on a creature you control.)
Whenever a creature you control with one or more counters on it dies, exile that many cards from the top of your library. Until your next end step, you may play those cards.
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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.
Myrkul, Lord of Bones 86%
$0.25#9822
"Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that card, except it's an enchantment and loses all other card types."
Hofri Ghostforge 85%
$0.22#7032
"Whenever another nontoken creature you control dies, exile it. If you do, create a token that's a copy of that creature, except it's a Spirit in addition to its other types and it has "When this token leaves the battlefield, return the exiled card to its owner's graveyard.""
Nightmare Shepherd 85%
$0.34#4176
"Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and it's a Nightmare in addition to its other types."
Curse of Clinging Webs 82%
$2.17#7527
"Whenever a nontoken creature enchanted player controls dies, exile it and you create a 1/2 green Spider creature token with reach."
Shelob, Dread Weaver 81%
$0.37#5753
"Whenever a nontoken creature an opponent controls dies, exile it."