Whetstone | Magic: The Gathering
Formats Whetstone is Legal in
Official Oracle Text for Whetstone
Official Rulings for Whetstone
10/4/2004 : It is not a draw effect so it will not cause a player with less than 2 cards in their library to lose.
10/4/2004 : Since you are putting more than one card in the graveyard at one time, each affected player can choose the order the 2 cards go in.