I just want to write in and say to all the people and especially CJ Slade that if you think your opponent DISCARDS cards when you use Imposter Prof Oak then you are TOTALLY STUPID. The cards says "Your opponent SHUFFLES his or her hand into his or her deck, then draws 7 cards." With that point said out, it must sound like I think that this card is bad. You are almost right, I rate this card 4 out of 10. But that isn't totally bad. I will tell you why. It has a good use in stall decks because in most games there would be a point when your opponent has 0-3 cards in his hand. In this case, they pick up an extra 4-7 cards, which can help. And if you have added 4 in your deck, then thats 16-28 cards lost during play. The average of that is 22, but even an extra 16 cards lost in a game defenetly speeds up your opponent from decking him/her self. The problem is that if you use it once, then it will take a while before your opponent uses his cards up again, so you probably won't be using all for so perfectly like I wrote it.