Ahem. Ways that this can rock: Jon listed requiring the player to bring items with drawbacks. He didn't seem sure about it, but I'd totally call that valid. How about a two-character party instead of three? We'd wondered "is three the maximum size, or the only possible size?" before, so a two-character challenge could be good in a world with a mandated three. How about, I dunno, requiring "deal a minimum of X damage per turn or you lose"? It would enforce even faster gameplay. Or "half of all your cards must deal damage," in a variation on the "bring drawback cards" requirement. I'm just tossing stuff out, here. How about you?