Numbing Dose 


Enchantment — Aura
Enchant artifact or creature
Enchanted permanent doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted permanent's controller, that player loses 1 life.
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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."
Soul Bleed 88%
$0.06#27126
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
+1 more matching line
One Thousand Lashes 88%
$0.11#19817
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
Stab Wound 88%
$0.20#8784
"At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life."
+1 more matching line
Power Taint 87%
$0.16#26035
"At the beginning of the upkeep of enchanted enchantment's controller, that player loses 2 life unless they pay {2}."
Clawing Torment 85%
$0.15#8411
"Enchanted permanent has "At the beginning of your upkeep, you lose 1 life.""
Cruel Reality 83%
$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."
Forsaken Wastes 83%
$14.85#14214
"At the beginning of each player's upkeep, that player loses 1 life."
Mornsong Aria 82%
$0.41#11258
"At the beginning of each player's draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles."
Maralen of the Mornsong 82%
$35.41#10080
"At the beginning of each player's draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles."
Sarevok, Deathbringer 81%
$0.17#13864
"At the beginning of each player's end step, if no permanents left the battlefield this turn, that player loses X life, where X is this card's power."
Psychic Overload 100%
$0.18#30147
"Enchanted permanent doesn't untap during its controller's untap step."
Malfunction 100%
$0.15#26193
"Enchanted permanent doesn't untap during its controller's untap step."
Weakstone's Subjugation 100%
$0.13#23244
"Enchanted permanent doesn't untap during its controller's untap step."
Tractor Beam 100%
$0.17#20147
"Enchanted permanent doesn't untap during its controller's untap step."
Hold for Questioning 100%
$0.18#20854
"Enchanted permanent doesn't untap during its controller's untap step and its activated abilities can't be activated."
Stuck in Summoner's Sanctum 100%
$0.18#10944
"Enchanted permanent doesn't untap during its controller's untap step and its activated abilities can't be activated."