Is the Onslaught booster box worth it?
Cheaper to buy singles
The booster box costs €1,429.29 today (Cardmarket trend). 29 cards are worth €5 or more — €595.23 together, 0.42× the box price. The top five cards make up 43% 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 |  Polluted Delta 321/350 | Onslaught | €84.45 | +2% |
| 2 |  Wooded Foothills 330/350 | Onslaught | €67.73 | -3% |
| 3 |  Flooded Strand 316/350 | Onslaught | €61.80 | -12% |
| 4 |  Windswept Heath 328/350 | Onslaught | €57.10 | +1% |
| 5 |  Bloodstained Mire 313/350 | Onslaught | €52.29 | -11% |
| 6 |  Mana Echoes 218/350 | Onslaught | €26.51 | -12% |
| 7 |  Exalted Angel 28/350 | Onslaught | €25.90 | -4% |
| 8 |  Goblin Piledriver 205/350 | Onslaught | €24.52 | -2% |
| 9 |  Goblin Sharpshooter 207/350 | Onslaught | €23.63 | -2% |
| 10 |  Rotlung Reanimator 164/350 | Onslaught | €16.58 | +1% |
| 11 |  Aggravated Assault 185/350 | Onslaught | €16.45 | +1% |
| 12 |  Biorhythm 247/350 | Onslaught | €11.51 | -7% |
| 13 |  Words of Worship 61/350 | Onslaught | €10.90 | +9% |
| 14 |  Steely Resolve 286/350 | Onslaught | €10.88 | -2% |
| 15 |  Weathered Wayfarer 59/350 | Onslaught | €10.83 | +4% |
| 16 |  Chain of Vapor 73/350 | Onslaught | €9.56 | -5% |
| 17 |  Ravenous Baloth 278/350 | Onslaught | €8.96 | -9% |
| 18 |  Cover of Darkness 133/350 | Onslaught | €8.84 | +11% |
| 19 |  Insurrection 213/350 | Onslaught | €7.79 | +12% |
| 20 |  Tempting Wurm 291/350 | Onslaught | €7.45 | -9% |
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.