Unlike the usual ‘static’ rules applied either to the base game or the more unique map-specific rules, the Fabled expansion makes the play much more dynamic across three games as rule cards will be revealed on anything from X number of houses to exhaustion of a particular resource in the market.
I've only played one round with another player (and one of the “robots”) on the original board game and I'm really looking forward to the next round with the rules carried across.