Chains of Mephistopheles 
Enchantment
$1260.44 #11213 1.76 32.4 years
If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.
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Cards similar to Chains of Mephistopheles 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.
Breathstealer's Crypt76%
$10.96↓#15471↓0.88↓29.7 years↓
"If a player would draw a card, instead they draw a card and reveal it. If it's a creature card, that player discards it unless they pay 3 life."
Notion Thief72%
$1.66↓#1215↑2.14↑13.5 years↓
"If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card."
Possessed Portal72%
$3.09↓#17458↓1.8222.4 years↓
"If a player would draw a card, that player skips that draw instead."
Horrifying Revelation72%
$0.15↓#22710↓0.12↓15.7 years↓
"Target player discards a card, then mills a card."
Zur's Weirding71%
$0.97↓#123411.30↓31.4 years↓
"If a player would draw a card, they reveal it instead. Then any other player may pay 2 life. If a player does, put that card into its owner's graveyard. Otherwise, that player draws a card."