Arc Runner 
Creature — Elemental Ox
$0.11 #16866 0.07 16.3 years
Haste (This creature can attack and 
as soon as it comes under your control.)
as soon as it comes under your control.)At the beginning of the end step, sacrifice this creature.
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Cards similar to Arc Runner 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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"At the beginning of the end step, sacrifice this creature."
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"At the beginning of the end step, sacrifice this creature."
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"At the beginning of the end step, sacrifice this creature."
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"At the beginning of the end step, sacrifice this creature."
Hellspark Elemental91%
$0.12↑#196660.0017.7 years↑
"At the beginning of the end step, sacrifice this creature."
Hell's Thunder90%
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"At the beginning of the end step, sacrifice this creature."
Skizzik90%
$0.16↑#21935↓0.0026.0 years↑
"At the beginning of the end step, if this creature wasn't kicked, sacrifice it."
Ichorid88%
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"At the beginning of the end step, sacrifice this creature."
+1 more matching line
Crumbling Colossus84%
$0.05↓#23995↓0.22↑15.3 years
"When this creature attacks, sacrifice it at end of combat."
Halam Djinn83%
$0.15↑#32200↓0.0026.0 years↑
"Haste"
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"Haste"
Viashino Cutthroat82%
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"At the beginning of the end step, return this creature to its owner's hand."
+1 more matching line
Viashino Sandstalker82%
$0.12↑#26358↓0.0030.0 years↑
"At the beginning of the end step, return this creature to its owner's hand."
+1 more matching line
Yavimaya Ants82%
$0.27↑#28900↓0.0530.4 years↑
"Cumulative upkeep 
"
"