Drinker of Sorrow {2}{B}
Creature — Horror
This creature can't block.
Whenever this creature deals combat damage, sacrifice a permanent.
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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.
Akki Underminer 90%
$0.15#22722
"Whenever this creature deals combat damage to a player, that player sacrifices a permanent of their choice."
Silverclad Ferocidons 88%
$2.58#5293
"Whenever this creature is dealt damage, each opponent sacrifices a permanent of their choice."
Phyrexian Totem 87%
$0.25#23770
"Whenever this permanent is dealt damage, if it's a creature, sacrifice that many permanents."
Shard of the Void Dragon 83%
$2.53#9574
"Whenever this creature attacks, each opponent sacrifices a nonland permanent of their choice."
Phyrexian Negator 82%
#10209
"Whenever this creature is dealt damage, sacrifice that many permanents."
Living Lore 82%
$0.10#23263
"Whenever this creature deals combat damage, you may sacrifice it. If you do, you may cast the exiled card without paying its mana cost."