Power Taint {1}{U}
Enchantment — Aura
Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, that player loses 2 life unless they pay {2}.
Cycling {2} ({2}, Discard this card: Draw a card.)
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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.
Torment of Scarabs 91%
$0.30#8651
"At the beginning of enchanted player's upkeep, that player loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card."
+1 more matching line
Stab Wound 90%
$0.20#8784
"At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life."
One Thousand Lashes 88%
$0.11#19817
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
Soul Bleed 88%
$0.06#27126
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
Numbing Dose 87%
$0.08#28028
"At the beginning of the upkeep of enchanted permanent's controller, that player loses 1 life."
Cruel Reality 86%
$2.78#9931
"At the beginning of enchanted player's upkeep, that player sacrifices a creature or planeswalker of their choice. If the player can't, they lose 5 life."
+1 more matching line
Withercrown 81%
$0.16#18491
"Enchanted creature has base power 0 and has "At the beginning of your upkeep, you lose 1 life unless you sacrifice this creature.""
+1 more matching line
Forsaken Wastes 81%
$14.85#14214
"Whenever this enchantment becomes the target of a spell, that spell's controller loses 5 life."