Castle Garenbrig
Land
This land enters tapped unless you control a Forest.
{T}: Add {G}.
{2}{G}{G}, {T}: Add six {G}. Spend this mana only to cast creature spells or activate abilities of creatures.
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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.
Shifting Woodland 100%
$5.28#363
"This land enters tapped unless you control a Forest."
+2 more matching lines
Great Arashin City 95%
$0.29#7160
"This land enters tapped unless you control a Forest or a Plains."
Gingerbread Cabin 92%
$0.36#2769
"This land enters tapped unless you control three or more other Forests."
Ba Sing Se 85%
$3.87#1872
"This land enters tapped unless you control a basic land."
+1 more matching line
Scorched Geyser 84%
$0.39#4140
"This land enters tapped unless you control two or more basic lands."
Eclipsed Steppe 84%
$2.53#4967
"This land enters tapped unless you control two or more basic lands."