Lightning Serpent 
Creature — Elemental Serpent
$5.07 #20047 0.06 20.2 years
Trample, haste
This creature enters with X +1/+0 counters on it.
At the beginning of the end step, sacrifice this creature.
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Cards similar to Lightning Serpent expected a card that isn't here?
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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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"This creature enters with four +1/+0 counters on it."
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"At the beginning of the end step, sacrifice this creature."
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Putrefax86%
$0.34↓#15787↑1.06↑16.1 years↓
"At the beginning of the end step, sacrifice this creature."
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Clockwork Swarm86%
$0.20↓#29876↓0.26↑31.1 years↑
"This creature enters with four +1/+0 counters on it."
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"At the beginning of the end step, sacrifice this creature."
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Hellspark Elemental84%
$0.12↓#196660.0017.7 years↓
"At the beginning of the end step, sacrifice this creature."
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Viashino Sandsprinter84%
$0.17↓#191140.25↑7.4 years↓
"Trample, haste"
+1 more matching line
Skizzik84%
$0.16↓#219350.0026.0 years↑
"At the beginning of the end step, if this creature wasn't kicked, sacrifice it."
+1 more matching line
Hell's Thunder83%
$0.31↓#203630.0018.0 years↓
"At the beginning of the end step, sacrifice this creature."