Hostile Hostel // Creeping Inn
Land // Artifact Creature — Horror Construct
{T}: Add {C}.
{1}, {T}, Sacrifice a creature: Put a soul counter on this land. Then if there are three or more soul counters on it, remove those counters, transform it, then untap it. Activate only as a sorcery.
Whenever this creature attacks, you may exile a creature card from your graveyard. If you do, each opponent loses X life and you gain X life, where X is the number of creature cards exiled with this creature.
{4}: This creature phases out.
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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.
Valley Rotcaller 86%
$3.33#2294
"Whenever this creature attacks, each opponent loses X life and you gain X life, where X is the number of other Squirrels, Bats, Lizards, and Rats you control."
Revenge of Ravens 85%
$0.48#2802
"Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life and you gain 1 life."
Sanguine Syphoner 85%
$0.21#6608
"Whenever this creature attacks, each opponent loses 1 life and you gain 1 life."
Postmortem Professor 85%
$0.24#17114
"Whenever this creature attacks, each opponent loses 1 life and you gain 1 life."
Ragged Recluse // Odious Witch 85%
$0.17#25285
"Whenever this creature attacks, defending player loses 1 life and you gain 1 life."
+1 more matching line
Agate-Blade Assassin 85%
$0.18#8468
"Whenever this creature attacks, defending player loses 1 life and you gain 1 life."
Brutal Hordechief 82%
$2.67#6618
"Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life."
Campaign of Vengeance 82%
$0.40#12164
"Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life."
Dai Li Agents 81%
$0.18#14213
"Whenever this creature attacks, each opponent loses X life and you gain X life, where X is the number of creatures you control with +1/+1 counters on them."
Fumulus, the Infestation 81%
$6.55#5120
"Whenever an Insect, Leech, Slug, or Worm you control attacks, defending player loses 1 life and you gain 1 life."
Hooded Blightfang 80%
$0.80#6647
"Whenever a creature you control with deathtouch attacks, each opponent loses 1 life and you gain 1 life."