Chains of Mephistopheles {1}{B}
Enchantment
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 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.
Possessed Portal 91%
$2.40#16908
"If a player would draw a card, that player skips that draw instead."
Breathstealer's Crypt 87%
$11.48#14862
"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."
Syphon Mind 86%
#1063
"Each other player discards a card. You draw a card for each card discarded this way."
Urgoros, the Empty One 86%
$0.26#18626
"Whenever this card deals combat damage to a player, that player discards a card at random. If the player can't, you draw a card."
Living Conundrum 85%
$0.12#17736
"If you would draw a card while your library has no cards in it, skip that draw instead."
Well of Ideas 85%
$2.17#6781
"At the beginning of each other player's draw step, that player draws an additional card."
Gerrard's Hourglass Pendant 84%
$2.89#7363
"If a player would begin an extra turn, that player skips that turn instead."
Ugin's Nexus 84%
$1.93#7112
"If a player would begin an extra turn, that player skips that turn instead."
Neheb, the Worthy 84%
$0.26#16201
"Whenever this card deals combat damage to a player, each player discards a card."
Howling Mine 83%
$5.42#723
"At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card."
Nekusar, the Mindrazer 82%
$3.76#3676
"At the beginning of each player's draw step, that player draws an additional card."
Rites of Flourishing 82%
$0.57#1522
"At the beginning of each player's draw step, that player draws an additional card."
Kami of the Crescent Moon 82%
$7.91#1817
"At the beginning of each player's draw step, that player draws an additional card."
Spiteful Visions 82%
$0.75#2290
"At the beginning of each player's draw step, that player draws an additional card."
Dictate of Kruphix 82%
$0.35#1908
"At the beginning of each player's draw step, that player draws an additional card."