But one question: does the + sign adds 1 to your rolled score or adds 1 dice, in addition to the base attribute value? I mean if you have 4 fight value, that means u roll 4 dice. A plus sign adds one more dice or just modifies an already rolled value?
The + sign adds more dice for you to roll, in essence it adds one to your stat. Int he example you gave if you got a card with +1 fight, you would now have a fight stat of 5, so you roll 5 dice needing 5+.