Netherborn Phalanx 

Creature — Horror
When this creature enters, each opponent loses 1 life for each creature they control.
Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)
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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.
Dominator Drone 90%
$0.06#22225
"When this creature enters, if you control another colorless creature, each opponent loses 2 life."
Grim Guardian 88%
$0.37#3169
"Whenever this creature or another enchantment you control enters, each opponent loses 1 life."
Malboro 88%
$0.19#9387
"When this creature enters, each opponent discards a card, loses 2 life, and exiles the top three cards of their library."
Corpse Knight 87%
$0.83#1388
"Whenever another creature you control enters, each opponent loses 1 life."
Dusk Mangler 87%
$0.25#10070
"When this creature enters, each opponent sacrifices a creature of their choice, discards a card, and loses 4 life."
Gray Merchant of Asphodel 85%
$5.69#242
"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."
Obyra, Dreaming Duelist 83%
$0.35#3394
"Whenever another Faerie you control enters, each opponent loses 1 life."
Malakir Bloodwitch 82%
$5.33#3471
"When this creature enters, each opponent loses life equal to the number of Vampires you control. You gain life equal to the life lost this way."
Bishop of the Bloodstained 82%
$0.26#16695
"When this creature enters, target opponent loses 1 life for each Vampire you control."
Suture Priest 82%
$5.33#1190
"Whenever a creature an opponent controls enters, you may have that player lose 1 life."