Season of the Witch {B}{B}{B}
Enchantment
At the beginning of your upkeep, sacrifice this enchantment unless you pay 2 life.
At the beginning of the end step, destroy all untapped creatures that didn't attack this turn, except for creatures that couldn't attack.
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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.
Earthlink 95%
#29152
"At the beginning of your upkeep, sacrifice this enchantment unless you pay {2}."
Icy Prison 91%
#27891
"At the beginning of your upkeep, sacrifice this enchantment unless any player pays {3}."
Aura Flux 89%
$0.22#24351
"Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay {2}.""
Siren's Call 86%
$0.19#21554
"At the beginning of the next end step, destroy all non-Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn."
Halls of Mist 81%
$3.40#19884
"Creatures that attacked during their controller's last turn can't attack."