Fraying Sanity 

Enchantment — Aura Curse
$0.50 #2872 0.65 9.1 years
Enchant player
At the beginning of each end step, enchanted player mills X cards, where X is the number of cards put into their graveyard from anywhere this turn.
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Cards similar to Fraying Sanity 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 the Bloody Tome84%
$0.23↓#12750↓0.09↓14.9 years↑
"At the beginning of enchanted player's upkeep, that player mills two cards."
+1 more matching line
Keening Stone75%
$0.37↓#9307↓0.27↓16.4 years↑
"
,
: Target player mills X cards, where X is the number of cards in that player's graveyard."
Crawling Infestation73%
$0.24↓#4540↓0.14↓4.8 years↓
"At the beginning of your upkeep, you may mill two cards."