Take the current set, Stellar Crown. To get all the promo cards, you need: 1. 4 promos from Build & Battle Boxes -- each contains 4 booster packs and is random which you get, so you need at least 4 B&BBs (16) 2. 2 single-pack and 2 three-pack blisters (8) 3. Elite Trainer Box (9) (cont'd)

4. Four Paradox Destinies tins -- each contains 5 booster packs from assorted sets, not sure off the top of my head what the spread is (20) That makes at least 33 booster packs from Stellar Crown plus 20 more from the last few sets. That's a decent amount of potential hits right there!