I have another idea: every player puts a card faced down on the table and says if it counts positive or negative, then the cards are revealed, the values are added and subtracted and if the sum is positive the action succeded. Does this count as numbers?
What if I use the maior acana from a tarot deck? They have a defined order, so there is a highest and a lowest card. Does comparing the order count as numers since the order is shown by a number?