Tournament Rules is what. It evens out card levels in tournaments and friendly matches and evens the playing field. That way, the paywall is smaller than Hearthstone, for instance.

Do you know about the competitive (tournament/friendly matches) part of this game? You don’t need to spend hundreds of dollars to be a viable competitive player within the “tournament rules”. Recently it was even made so cards are automatically leveled up as well as down to the same level when playing friendly…