For example the creator of the dx consumables can make an api that can let other mod creators make dx packs and cards
Or a regiumus (based of the Latin word of royalty regium) a legendary joker that adds a 10,j,q,k,and ace to the deck with a royal sticker. Now as for the actual stats: if a card with the sticker is played add a x0.1 multiplier to the card, additionally if a royal flush is played increase add a x1 multiplier