Tenacious Dead 
Creature — Skeleton Warrior
When this creature dies, you may pay {1}{B}. If you do, return it to the battlefield tapped under its owner's control.
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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.
Insidious Bookworms 91%
$0.15#28531
"When this creature dies, you may pay {1}{B}. If you do, target player discards a card at random."
Breathkeeper Seraph 90%
$1.66#8084
"As long as this card is paired with another creature, each of those creatures has "When this creature dies, you may return it to the battlefield under its owner's control at the beginning of your next upkeep.""
Drainpipe Vermin 87%
$0.25#12913
"When this creature dies, you may pay {B}. If you do, target player discards a card."
Reborn Hero 87%
$0.31#30666
"As long as there are seven or more cards in your graveyard, this creature has "When this creature dies, you may pay {W}{W}. If you do, return this card to the battlefield under your control.""
Phytotitan 87%
$0.76#8850
"When this creature dies, return it to the battlefield tapped under its owner's control at the beginning of their next upkeep."
Cyclops Superconductor 87%
$0.17#16725
"When this creature dies, you may pay {E}{E}{E}. When you do, this creature deals damage equal to its power to any target."
Lost Auramancers 87%
$0.22#16428
"When this creature dies, if it had no time counters on it, you may search your library for an enchantment card, put it onto the battlefield, then shuffle."
Liberated Livestock 86%
$0.31#17456
"When this creature dies, create a 1/1 white Cat creature token with lifelink, a 1/1 white Bird creature token with flying, and a 2/4 white Ox creature token. For each of those tokens, you may put an Aura card from your hand and/or graveyard onto the battlefield attached to it."
Ambitious Augmenter 86%
$0.27#15890
"When this creature dies, if it had one or more counters on it, create a 0/0 green and blue Fractal creature token, then put this creature's counters on that token."
Termagant Swarm 86%
$2.34#6499
"When this creature dies, create a number of 1/1 green Tyranid creature tokens equal to this creature's power."
Deathknell Berserker 85%
$0.16#24074
"When this creature dies, if its power was 3 or greater, create a 2/2 black Zombie Berserker creature token."
Museum Nightwatch 85%
$0.05#27591
"When this creature dies, create a 2/2 white and blue Detective creature token."
Giant Albatross 85%
$0.15#29288
"When this creature dies, you may pay {1}{U}. If you do, for each creature that dealt damage to this creature this turn, destroy that creature unless its controller pays 2 life. A creature destroyed this way can't be regenerated."
Triplicate Titan 85%
$1.54#2223
"When this creature dies, create a 3/3 colorless Golem artifact creature token with flying, a 3/3 colorless Golem artifact creature token with vigilance, and a 3/3 colorless Golem artifact creature token with trample."
Vaultborn Tyrant 85%
$32.68#1809
"When this creature dies, if it's not a token, create a token that's a copy of it, except it's an artifact in addition to its other types."
Seedguide Ash 85%
$2.93#7418
"When this creature dies, you may search your library for up to three Forest cards, put them onto the battlefield tapped, then shuffle."
Liege of the Hollows 85%
$5.52#19842
"When this creature dies, each player may pay any amount of mana. Then each player creates a number of 1/1 green Squirrel creature tokens equal to the amount of mana they paid this way."
Brine Hag 85%
$2.23#30726
"When this creature dies, change the base power and toughness of all creatures that dealt damage to it this turn to 0/2."