Cautery Sliver {R}{W}
Creature — Sliver
All Slivers have "{1}, Sacrifice this permanent: This permanent deals 1 damage to any target."
All Slivers have "{1}, Sacrifice this permanent: Prevent the next 1 damage that would be dealt to target player, planeswalker, or Sliver creature this turn."
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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.
Acidic Sliver 97%
#18481
"All Slivers have "{2}, Sacrifice this permanent: This permanent deals 2 damage to any target.""
Mindlash Sliver 86%
$0.27#18377
"All Slivers have "{1}, Sacrifice this permanent: Each player discards a card.""
Mindwhip Sliver 86%
$0.38#25990
"All Slivers have "{2}, Sacrifice this permanent: Target player discards a card at random. Activate only as a sorcery.""