Vicious Battlerager {3}{B}
Creature — Dwarf Barbarian
When this creature enters, you take the initiative.
Spiked Retribution — Whenever this creature becomes blocked by a creature, that creature's controller loses 5 life.
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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.
Death Charmer 88%
$0.10#28469
"Whenever this creature deals combat damage to a creature, that creature's controller loses 2 life unless they pay {2}."
Ashenmoor Liege 87%
$0.43#15977
"Whenever this creature becomes the target of a spell or ability an opponent controls, that player loses 4 life."
Vedalken Ghoul 87%
$0.21#27008
"Whenever this creature becomes blocked, defending player loses 4 life."
Glass Asp 86%
$0.17#27109
"Whenever this creature deals combat damage to a player, that player loses 2 life at the beginning of their next draw step unless they pay {2} before that step."
Nafs Asp 85%
$0.09#28687
"Whenever this creature deals damage to a player, that player loses 1 life at the beginning of their next draw step unless they pay {1} before that draw step."
Thrashing Mudspawn 84%
$0.11#28401
"Whenever this creature is dealt damage, you lose that much life."
Tethered Skirge 83%
$0.18#31555
"Whenever this creature becomes the target of a spell or ability, you lose 1 life."
Flayed Nim 82%
$0.14#24376
"Whenever this creature deals combat damage to a creature, that creature's controller loses that much life."
Archfiend of Spite 80%
$0.80#8958
"Whenever a source an opponent controls deals damage to this creature, that source's controller loses that much life unless they sacrifice that many permanents of their choice."