Curse of Thirst 
Enchantment — Aura Curse
$0.33 #10635 0.22 14.7 years
Enchant player
At the beginning of enchanted player's upkeep, this Aura deals damage to that player equal to the number of Curses attached to them.
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Cards similar to Curse of Thirst 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.
Curse of Surveillance82%
$0.18↓#104000.37↑4.9 years↓
"At the beginning of enchanted player's upkeep, any number of target players other than that player each draw cards equal to the number of Curses attached to that player."
+1 more matching line
Lynde, Cheerful Tormentor70%
$1.30↑#122190.204.9 years↓
"At the beginning of your upkeep, you may attach a Curse attached to you to one of your opponents. If you do, draw two cards."