Keening Stone
Artifact
, 
: Target player mills X cards, where X is the number of cards in that player's graveyard.
As it spins, dead voices shriek in an ever-increasing cacophony, rending the mind asunder.
Jung Park
Rise of the Eldrazi (ROE)
• #219Rulings
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.
(wotc • 2010-06-15)
Rulings
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.
(wotc • 2010-06-15)