Should create a fun Grimoire Trading Card game set that Xûr sells that has for example 30 different cards, every pack costs 20 Strange Coins and contains 10 cards (5 Common, 4 Uncommon and 1 Rare or 1 Legendary or 1 Exotic). The Common - Rare cards can be cards of enemies, locations, bosses and old characters from the Lore, the Legendary cards are Full art cards of well known characters of the Light and Darkness like Shaxx, Lord Saladin, Zavalla, Cayde-6, Xûr and characters from the tales of Darkness like Dredgen Yor, while the Exotic Cards feature beautiful art of old and new Exotic weapons such as Icebreaker, Gjallarhorn, Universal Remote, Ace of Spades, Thorn, Hawkthorn and many other exotic weapons over the years. Since these packs are popular among the Tower's folks, Xûr limits you to maximum one pack a week. The more cards you collect the more Grimoire Score you get as you will then in the Grimoire page have a Card Binder where you can check out the cards you currently have and even inspect them to view them better. Just think that would be fun to collect on a weekly basis from Xûr, see how long it takes before you get all 30 cards, each duplicate card you can trade in to Xûr for ether Bright Dust or 1 Strange Coin.