Keening Stone
Oracle Text
, : Target player puts the top X cards of their library into their graveyard, where X is the number of cards in that player's graveyard.
Card Rulings
6/15/2010 The value of X is determined as the ability starts to resolve. If the targeted player has five cards in their graveyard at that time, for example, this ability will put five more cards into that graveyard from the top of that player’s library.
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