Is the Mastery Pack Guardian booster box worth it?
Many valuable cards
The booster box costs €56.03 today (Cardmarket trend). 41 cards are worth €5 or more — €2,889.16 together, 51.56× the box price. The top five cards make up 54% of the whole set’s value.
How cards are priced
Most cards in any set are commons worth cents. Whether a box pays off depends on hitting one of the few top cards.
Most valuable cards in the set
Full set →| # | Card | Set | Price today | 30 days |
|---|---|---|---|---|
| 1 |  Testament of Valahai | Mastery Pack Guardian | €542.45 | +11% |
| 2 |  Jarl Vetreiði | Mastery Pack Guardian | €528.93 | -1% |
| 3 |  Ley Line of the Old Ones | Mastery Pack Guardian | €304.48 | +1% |
| 4 |  Base of the Mountain | Mastery Pack Guardian | €134.63 | -3% |
| 5 |  Valda, Seismic Impact MPG001 | Mastery Pack Guardian | €129.75 | +13% |
| 6 |  Test of Iron Grip | Mastery Pack Guardian | €113.67 | +53% |
| 7 |  Seismic Surge | Mastery Pack Guardian | €111.26 | +6% |
| 8 | Seismic Surge | Mastery Pack Guardian | €102.37 | +18% |
| 9 | Seismic Surge | Mastery Pack Guardian | €102.32 | -2% |
| 10 | Base of the Mountain | Mastery Pack Guardian | €99.97 | +7% |
| 11 | Ley Line of the Old Ones | Mastery Pack Guardian | €96.99 | -11% |
| 12 |  Valda Brightaxe MPG002 | Mastery Pack Guardian | €67.91 | +51% |
| 13 |  Seismic Eruption | Mastery Pack Guardian | €59.58 | +2% |
| 14 |  Testament of Valahai | Mastery Pack Guardian | €49.33 | -21% |
| 15 |  Put 'Em In Their Place | Mastery Pack Guardian | €45.13 | +35% |
| 16 |  Fearless Confrontation | Mastery Pack Guardian | €39.69 | -13% |
| 17 | Fearless Confrontation | Mastery Pack Guardian | €32.07 | +7% |
| 18 |  Smelting of the Old Ones | Mastery Pack Guardian | €28.26 | +15% |
| 19 |  Solid Ground | Mastery Pack Guardian | €27.83 | -16% |
| 20 |  Blinding of the Old Ones | Mastery Pack Guardian | €27.65 | +10% |
Prices: Cardmarket trend, updated daily — as of Oct 29, 2026.
How to read these numbers
The full-set value is what all cards would cost as singles. One box won’t complete the set and the rarest cards are rare, so we focus on cards from €5. If they are worth many times the box price, the set is rich in valuable cards; if value is concentrated in a few cards (high top-5 share), opening is a lottery.
If you want a specific card, buying it as a single is almost always cheaper. A box makes sense if you enjoy opening, play limited/draft or collect sealed product.