Flesh and Blood Super Slam vs Mastery Pack: Guardian booster box: which is worth opening?
Mastery Pack: Guardian is the better box to open: its cards are worth 174% of its price after selling costs, against 80% for Super Slam.
Side by side
| Super Slam booster box | Mastery Pack: Guardian booster box | |
|---|---|---|
| Verdict | Keep it sealed | Rip it |
| Box price today | $60€54 | $65€58 |
| Cards inside, after selling costs | $48€43 | $112€100 |
| Cards ÷ price | 80% | 174% |
| Boxes that lose money | 79 of 100 boxes | 36 of 100 boxes |
| A typical box (median) | $28€25 | $76€68 |
| Rarest pull | Fabled: 2 of 100 boxes | Marvel: 6 of 100 boxes |
| Packs | 24 packs of 15 cards | 12 packs of 13 cards |
| Released | September 26, 2025 | August 8, 2025 |
The two boxes
How we work this out
Both boxes are worked out the same way: today's card prices, selling costs taken off, and simulated boxes to see how often one loses money. Read the full method