Pile On
March of the Machine Promos (PMOM #122p)
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CKCard Kingdom
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Pile On
CMC: 4
Type
Instant
Rules Text
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 
or one mana of that creature's color.)
Destroy target creature or planeswalker. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Printing
March of the Machine Promos (PMOM #122p)
rare
Illustrated by Javier Charro