Spark Elemental 
Creature — Elemental
$0.28 #19475 0.29 22.3 years
Trample, haste (This creature can deal excess combat damage to the player or planeswalker it's attacking. 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 Spark Elemental 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."
+1 more matching line
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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."
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$0.22↓#28550↓0.06↓30.2 years↑
"Trample, haste"
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$0.34↑#24395↓0.17↓17.3 years↓
"Trample, haste"
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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."
+1 more matching line
Skizzik86%
$0.17↓#216600.2125.9 years↑
"At the beginning of the end step, if this creature wasn't kicked, sacrifice it."
+1 more matching line
Impetuous Devils84%
$0.26↓#160260.00↓10.1 years↓
"At the beginning of the end step, sacrifice this creature."
+1 more matching line
Lightning Skelemental84%
$0.32↑#10549↑0.207.2 years↓
"At the beginning of the end step, sacrifice this creature."
+1 more matching line
Viashino Sandsprinter84%
$0.18↓#187480.06↓7.2 years↓
"Trample, haste"
+1 more matching line
Shatterskull Charger83%
$0.24↓#178410.265.9 years↓
"Trample, haste"
Lightning Shrieker82%
$0.05↓#220230.00↓11.6 years↓
"Flying, trample, haste"
Hellspark Elemental82%
$0.12↓#195230.60↑17.6 years↓
"At the beginning of the end step, sacrifice this creature."
+1 more matching line
Ichorid82%
$0.61↑#229760.00↓24.6 years↑
"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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"Trample"
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"Trample"