Green Dragon 
Creature — Dragon
$0.21 #13907 0.35 5.1 years
Flying
Poison Breath — When this creature enters, until end of turn, whenever a creature an opponent controls is dealt damage, destroy it.
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Cards similar to Green Dragon 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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Ancient Gold Dragon80%
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"Flying"
Serpentine Basilisk80%
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Ohran Viper80%
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"Whenever this creature deals combat damage to a creature, destroy that creature at end of combat."
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"Whenever this creature deals combat damage to a creature, destroy that creature at end of combat."
Ancient Bronze Dragon78%
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Nalfeshnee78%
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Stinkweed Imp76%
$1.12↑#3104↑0.45↑20.9 years↑
"Whenever this creature deals combat damage to a creature, destroy that creature."
Maddening Imp75%
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"Flying"
Creepy Doll74%
$0.90↑#8956↑0.3814.9 years↑
"Whenever this creature deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature."
Plague Fiend74%
$0.18↓#25874↓0.57↑26.3 years↑
"Whenever this creature deals combat damage to a creature, destroy that creature unless its controller pays 
."
."
Storm, Shaker of Skies72%
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"Flying"
Stoic Ephemera72%
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Death Pits of Rath72%
$0.91↑#19052↓0.4328.9 years↑
"Whenever a creature is dealt damage, destroy it. It can't be regenerated."
Dripping Dead72%
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Venomous Fangs72%
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