Worst rules in the game, and they aggravate an already broken system. You have NPCs that cheat in the most literal sense - they have more high rank cards than you possibly can, and their "random" pulls from their tiny pool of awesome cards as opposed to a full range of 1-star cards like you. It divorces almost any sense of strategy in choosing your cards, since you choose neither the deck nor the card you play. It's stupid, plain and simple. It takes what can be a fun game and turns it into pure RNG.