Mnemonic Sliver 

Creature — Sliver
All Slivers have "{2}, Sacrifice this permanent: Draw a card."
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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.
Mindlash Sliver 86%
$0.27#18377
"All Slivers have "{1}, Sacrifice this permanent: Each player discards a card.""