Purestrain Genestealer 
Creature — Tyranid
$0.38 #11496 0.00 3.9 years
This creature enters with two +1/+1 counters on it.
Vanguard Species — Whenever this creature attacks, you may remove a +1/+1 counter from it. If you do, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
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Cards similar to Purestrain Genestealer 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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"Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle."
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"Whenever this creature deals combat damage to a player, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle."
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"This creature enters with two +1/+1 counters on it."
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"This creature enters with two +1/+1 counters on it."
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"This creature enters with a +1/+1 counter on it."
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"Whenever this creature enters or attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle."
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"This creature enters with four +1/+1 counters on it."
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$0.97↑#93350.25↑28.5 years↑
"This creature enters with two +1/+1 counters on it."
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$0.09↓#24176↓0.0918.6 years↑
"This creature enters with a +1/+1 counter on it."
Mindwarper84%
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"This creature enters with three +1/+1 counters on it."
Centaur Rootcaster84%
$0.14↓#24008↓0.27↑24.3 years↑
"Whenever this creature deals combat damage to a player, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle."
Fertilid83%
$0.12↓#2983↑0.18↑18.6 years↑
"
, Remove a +1/+1 counter from this creature: Target player searches their library for a basic land card, puts it onto the battlefield tapped, then shuffles."
, Remove a +1/+1 counter from this creature: Target player searches their library for a basic land card, puts it onto the battlefield tapped, then shuffles."+1 more matching line
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"This creature enters with two +1/+1 counters on it."
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"This creature enters with X +1/+1 counters on it."
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"This creature enters with a +1/+1 counter on it."
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"This creature enters with a +1/+1 counter on it."
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"This creature enters with four +1/+1 counters on it."
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"this card enters with X +1/+1 counters on it."
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"This creature enters with six +1/+1 counters on it."