Gray Merchant of Asphodel {3}{B}{B}
Creature — Zombie
When this creature enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)
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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.
Dusk Mangler 89%
$0.25#10070
"When this creature enters, each opponent sacrifices a creature of their choice, discards a card, and loses 4 life."
Suture Priest 87%
$5.33#1190
"Whenever a creature an opponent controls enters, you may have that player lose 1 life."
Blood Seeker 87%
$0.38#2617
"Whenever a creature an opponent controls enters, you may have that player lose 1 life."
Dominator Drone 87%
$0.06#22225
"When this creature enters, if you control another colorless creature, each opponent loses 2 life."
Grim Servant 86%
$0.28#3957
"When this creature enters, search your library for a card with mana value less than or equal to your devotion to black, reveal it, put it into your hand, then shuffle. You lose 3 life."
Bellowing Saddlebrute 86%
$0.08#29037
"When this creature enters, you lose 4 life unless you attacked this turn."
Netherborn Phalanx 85%
$0.93#15551
"When this creature enters, each opponent loses 1 life for each creature they control."
Malboro 85%
$0.19#9387
"When this creature enters, each opponent discards a card, loses 2 life, and exiles the top three cards of their library."
Fathom Fleet Boarder 85%
$0.05#28022
"When this creature enters, you lose 2 life unless you control another Pirate."
Grim Guardian 84%
$0.37#3169
"Whenever this creature or another enchantment you control enters, each opponent loses 1 life."
Boomer Scrapper 83%
$0.25#11672
"Whenever this creature enters or attacks, you lose 1 life and create a Junk token."