Sacrifice X Zombies, then reveal cards from the top of your library until you reveal a number of Zombie creature cards equal to the number of Zombies sacrificed this way. Put those cards onto the battlefield and the rest on the bottom of your library in a random order.
Near Mint - £0.70
Lightly Played - £0.60
Moderately Played - £0.50
Heavily Played - £0.30
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Near Mint Non English - £0.70
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Heavily Played Non English - £0.30
Damaged Non English - £0.20