Solitary Confinement {2}{W}
Enchantment
At the beginning of your upkeep, sacrifice this enchantment unless you discard a card.
Skip your draw step.
You have shroud. (You can't be the target of spells or abilities.)
Prevent all damage that would be dealt to you.
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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.
Contamination 87%
$17.70#7833
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a creature."
Sacred Mesa 87%
$0.29#19254
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a Pegasus."
Energy Field 87%
$3.82#14240
"Prevent all damage that would be dealt to you by sources you don't control."
+1 more matching line
Gideon Blackblade 86%
$1.30#8620
"Prevent all damage that would be dealt to this card during your turn."
Soul Echo 86%
$1.36#24519
"At the beginning of your upkeep, sacrifice this enchantment if there are no echo counters on it. Otherwise, target opponent may choose that for each 1 damage that would be dealt to you until your next upkeep, you remove an echo counter from this enchantment instead."
Nicol Bolas 85%
$1.43#12218
"At the beginning of your upkeep, sacrifice this card unless you pay {U}{B}{R}."
Territorial Dispute 84%
$0.44#28645
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a land."
The Wanderer 84%
$0.31#4905
"Prevent all noncombat damage that would be dealt to you and other permanents you control."
Thelon's Chant 83%
$0.21#28925
"At the beginning of your upkeep, sacrifice this enchantment unless you pay {G}."
Nature's Wrath 83%
#23372
"At the beginning of your upkeep, sacrifice this enchantment unless you pay {G}."