Cathedral Membrane 
Artifact Creature — Phyrexian Wall
$0.22 #17915 0.50 15.3 years
( can be paid with either 
or 2 life.)
can be paid with either or 2 life.)Defender
When this creature dies during combat, it deals 6 damage to each creature it blocked this combat.
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Cards similar to Cathedral Membrane 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.
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"When this creature dies, it deals 2 damage to target creature."
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Fortified Rampart76%
$0.25↑#9740↑0.00↓10.9 years↓
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$0.10↓#28391↓0.24↓32.1 years↑
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"Defender"