I still can't understand why Bishop keeps going down in Qvist's ratings. The reason it gives a benefit to your opponent is because it's effect is really strong.
Then again, I think it was especially strong on this board, where I had enlightened* Minions, so I could trash a card with Bishop and then draw a new hand a lot of times. My opponent went for Castles, so he had to deal with a bunch of dead cards in his deck, while with Bishop, you can trash all the extra cards and still get VP for them. Using Bishop to trash Crumbling Castle, Sprawling Castle, and the Duchy gained with Sprawling Castle is fun. (Those were the only two castles I bought. My opponent got the rest.)
(*a word which here means my Minions learned Lost Arts)
Wish I could post the game log.
game #26087873