Castle Locthwain
Land
This land enters tapped unless you control a Swamp.
{T}: Add {B}.
{1}{B}{B}, {T}: Draw a card, then you lose life equal to the number of cards in your hand.
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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.
Spymaster's Vault 100%
$0.93#1137
"This land enters tapped unless you control a Swamp."
+1 more matching line
Woodland Cemetery 95%
$0.43#113
"This land enters tapped unless you control a Swamp or a Forest."
+1 more matching line
Drowned Catacomb 88%
#109
"This land enters tapped unless you control an Island or a Swamp."
+1 more matching line
Dalkovan Encampment 88%
$0.50#3597
"This land enters tapped unless you control a Swamp or a Mountain."
Witch's Cottage 85%
$1.05#877
"This land enters tapped unless you control three or more other Swamps."