Card combo including the leader with all his stats and special abilities for the dungeon (where possible) at all campaign levels and the choice of minions for the level plus the description for the dungeon. Let your players do the hard work of building the dungeon while you choose which creatures to throw at them, with the added advantage of not having to work out the maths for the extra health, armour or speed for the leader because it has already been factored into the card for you.