Withercrown 

Enchantment — Aura
Enchant creature
Enchanted creature has base power 0 and has "At the beginning of your upkeep, you lose 1 life unless you sacrifice this creature."
click a line to search just that ability, click more to combine them
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.
Pillory of the Sleepless 96%
$0.26#18450
"Enchanted creature has "At the beginning of your upkeep, you lose 1 life.""
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."
+1 more matching line
Stab Wound 87%
$0.20#8784
"At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life."
+1 more matching line
Torment of Scarabs 82%
$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."
Cruel Reality 81%
$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."
Power Taint 81%
$0.16#26035
"At the beginning of the upkeep of enchanted enchantment's controller, that player loses 2 life unless they pay {2}."