Cosmic Larva 
Creature — Beast
$0.38 #19799 0.12 22.4 years
Trample
At the beginning of your upkeep, sacrifice this creature unless you sacrifice two lands.
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Cards similar to Cosmic Larva 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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"Cumulative upkeep—Sacrifice a land."
+1 more matching line
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"At the beginning of your upkeep, sacrifice this card unless you sacrifice a land."
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"When this creature enters, sacrifice it unless you sacrifice a land."
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"At the beginning of your upkeep, destroy this enchantment unless you sacrifice two Islands."
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"When you control no lands, sacrifice this creature."
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"At the beginning of your upkeep, sacrifice this creature unless you pay 
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"At the beginning of your upkeep, sacrifice this creature unless you pay ."
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"At the beginning of your upkeep, sacrifice this creature unless you pay ."
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Whipstitched Zombie82%
$0.11↓#32029↓0.00↓26.4 years↑
"At the beginning of your upkeep, sacrifice this creature unless you pay 
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"At the beginning of your upkeep, sacrifice this creature unless you pay 
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"At the beginning of your upkeep, sacrifice this creature unless you pay ."
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"At the beginning of your upkeep, sacrifice this creature unless you pay ."
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"At the beginning of your upkeep, sacrifice this creature unless you pay 
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."