long ago in the before times , magic the gathering had a rpg where you walked around, did stuff, then had a card battle. Perhaps they could include the deck into the game as a way of generating the results of actions , and even include the player having a hand to influence fate. its the same thing as rolling dice , just different math. Then you can choose to throw extra "dice" at something you want to succeed. I second the rogue-like or the disco elysium style too. As long as they just followed a established formula that already worked I think it could be alright