Disturbing Conversion 

Enchantment — Aura
$0.07 #21660 0.22 3.5 years
Flash
Enchant creature
When this Aura enters, each player mills two cards.
Enchanted creature gets -X/-0, where X is the number of cards in its controller's graveyard.
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Cards similar to Disturbing Conversion 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.
Sibsig Host92%
$0.09↑#250050.2411.7 years↑
"When this creature enters, each player mills three cards."
So Tiny87%
$0.11↑#248210.07↓7.0 years↑
"Enchanted creature gets -2/-0. It gets -6/-0 instead as long as its controller has seven or more cards in their graveyard."
+2 more matching lines
Mindwrack Harpy85%
$0.22↑#7538↑0.206.7 years↑
"At the beginning of combat on your turn, each player mills three cards."
Spontaneous Mutation84%
$0.06↓#209400.35↑10.2 years↑
"Enchanted creature gets -X/-0, where X is the number of cards in your graveyard."
+1 more matching line
Worry Beads83%
$0.58↑#237130.1827.0 years↑
"At the beginning of each player's upkeep, that player mills a card."
Fear of Death82%
$0.15↑#227640.00↓4.9 years↑
"Enchanted creature gets -X/-0, where X is the number of cards in your graveyard."
+2 more matching lines
Shared Trauma80%
$0.43↑#190050.2615.3 years↑
"Starting with you, each player may pay any amount of mana. Each player mills X cards, where X is the total amount of mana paid this way."
Eye Collector79%
$0.16↑#10456↑0.167.0 years↑
"Whenever this creature deals combat damage to a player, each player mills a card."
Nezumi Freewheeler // Hideous Fleshwheeler78%
$0.23↑#238950.253.5 years
"When this creature enters, each player mills three cards."