Dwarven Mine
Land — Mountain
({T}: Add {R}.)
This land enters tapped unless you control three or more other Mountains.
When this land enters untapped, create a 1/1 red Dwarf creature token.
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Cards that do something similar 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.
Dreamroot Cascade 82%
$1.21#180
"This land enters tapped unless you control two or more other lands."
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"This land enters tapped unless you control two or more other lands."
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"This land enters tapped unless you control two or more other lands."
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"This land enters tapped unless you control two or more other lands."
Scorched Geyser 82%
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"This land enters tapped unless you control two or more basic lands."