石なる知識 (Brainstone) (ja)
Artifact (CMC 1)
,
, Sacrifice Brainstone: Draw three cards, then put two cards from your hand on top of your library in any order.
Decks with Brainstone
[MH2] Modern Horizons 2 #223 (U)
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[MH2] Modern Horizons 2 #426 (U)