Dread Summons {X}{B}{B}
Sorcery
Each player mills X cards. For each creature card put into a graveyard this way, you create a tapped 2/2 black Zombie creature token. (To mill a card, a player puts the top card of their library into their graveyard.)
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Cards that do something similar expected a card that isn't here?
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Breach the Multiverse 85%
$10.83#840
"Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types."
King Narfi's Betrayal 82%
$0.31#8695
"Each player mills four cards. Then you may exile a creature or planeswalker card from each graveyard."