Glacial Fortress
Land
This land enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.
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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.
Cori Mountain Monastery 100%
$1.19#3718
"This land enters tapped unless you control a Plains or an Island."
Castle Ardenvale 93%
$0.32#693
"This land enters tapped unless you control a Plains."
+1 more matching line
Monumental Henge 93%
$0.35#1477
"This land enters tapped unless you control a Plains."
+1 more matching line
Idyllic Grange 89%
$0.34#4245
"This land enters tapped unless you control three or more other Plains."
Abandoned Air Temple 88%
$5.76#1458
"This land enters tapped unless you control a basic land."
+1 more matching line
Scorched Geyser 86%
$0.39#4140
"This land enters tapped unless you control two or more basic lands."
Eclipsed Steppe 86%
$2.53#4967
"This land enters tapped unless you control two or more basic lands."