Saying something that makes the player think it's a deck they can't beat will make the player quit. It would be bad if everyone stopped playing arena after seeing lots of decks with a message saying it's a deck they can't beat. Eventually, they will think that arena is only made up of "OP" decks, since they don't have a chance to see what they really are after they quit. If the person can't build a counter, they'll just stop playing. So no, I don't like this.