It has interesting applications
To me, that included casting spells, activating abilities, monitoring cooldowns, and completing adventures
For War of the Spark (war), replace one of the uncommon, rare, or mythic rare cards with a random Planeswalker card of the same rarity Once the cards for each booster are known, group the 6 rare / mythic rare cards into their own array for UI simplicity and then bundle everything together in a nice object that groups any duplicates found across the packs There is nothing particularly difficult about the above but it was still fun the first time I got it working to see my console filling up with cards as if Id opened a physical pack
You can get some thematic ones, like Gyre Sage in +1/+1 counter decks, but the combination of any color and hexproof makes this a reliable dork for any deck
For each card you discarded, draw a card
You both get rid of really good cards that your opponents are going to blow you out with and then get to do the blowing out yourself