Target player puts the top two cards of his or her library into his or her graveyard.
Draw a card.
1/22/2011 If the target player is an illegal target when Thought Scour tries to resolve, it will be countered and none of its effects will happen. You won't draw a card.
1/22/2011 Follow the instructions in the order listed on the card: if you target yourself, you'll put the top two cards of your library into your graveyard and then draw a card.