Is the That Time I Got Reincarnated as a Slime booster box worth it?
A lottery — value in a few cards
The booster box costs €89.84 today (Cardmarket trend). 40 cards are worth €5 or more — €2,558.69 together, 28.48× the box price. The top five cards make up 67% 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 |  Gushing Flames, Shizu TSK/S70-TE18SP SP | That Time I Got Reincarnated as a Slime | €549.99 | 0% |
| 2 |  Rimuru Tempest TSK/S70-TE01SP SP | That Time I Got Reincarnated as a Slime | €320.00 | 0% |
| 3 |  After the Battle, Rimuru | That Time I Got Reincarnated as a Slime | €302.86 | +28% |
| 4 |  ""Conqueror of Flames"" Shizu | That Time I Got Reincarnated as a Slime | €301.98 | +4% |
| 5 |  Tribe's Princess, Shuna | That Time I Got Reincarnated as a Slime | €295.00 | +49% |
| 6 |  Head of the Monsters, Rimuru | That Time I Got Reincarnated as a Slime | €120.98 | +25% |
| 7 |  Successor, Rimuru | That Time I Got Reincarnated as a Slime | €93.45 | -9% |
| 8 | ""Dragonoid"" Milim | That Time I Got Reincarnated as a Slime | €78.29 | +3% |
| 9 |  Achieving Vindication, Shion | That Time I Got Reincarnated as a Slime | €78.19 | +7% |
| 10 |  Child on the Inside? Milim TSK/S70-E032S SR | That Time I Got Reincarnated as a Slime | €36.58 | +60% |
| 11 |  Memories of Japan, Shizu TSK/S70-E066S SR | That Time I Got Reincarnated as a Slime | €35.13 | +5% |
| 12 |  Rimuru Tempest TSK/S70-TE01 TD | That Time I Got Reincarnated as a Slime | €33.01 | +157% |
| 13 | ""Dragonoid"" Milim | That Time I Got Reincarnated as a Slime | €27.92 | +184% |
| 14 |  Shared Journey, Rimuru TSK/S70-E009S SR | That Time I Got Reincarnated as a Slime | €26.07 | +71% |
| 15 |  Mighty Warrior, Shion TSK/S70-E008S SR | That Time I Got Reincarnated as a Slime | €21.55 | +68% |
| 16 | After the Battle, Rimuru | That Time I Got Reincarnated as a Slime | €20.23 | +6% |
| 17 | ""Predator"" Rimuru | That Time I Got Reincarnated as a Slime | €20.00 | 0% |
| 18 |  Last Journey, Shizu TSK/S70-E075S SR | That Time I Got Reincarnated as a Slime | €19.32 | +42% |
| 19 |  Legendary Hero TSK/S70-E097R RRR | That Time I Got Reincarnated as a Slime | €17.62 | -1% |
| 20 |  Shared Journey, Shizu TSK/S70-E037S SR | That Time I Got Reincarnated as a Slime | €12.22 | +24% |
Prices: Cardmarket trend, updated daily — as of Oct 30, 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.