Each box has a 3% chance to contain a mythical item. This probability information is shown in-game prior to unboxing.
Each box is an independent roll. This means:
- Boxes do not have a pity-timer mechanic.
- Previous results do not affect future outcomes.
- Opening multiple boxes only improves overall probability. It does not raise individual probability.
- Receiving a mythical item is never guaranteed, regardless of how many boxes are opened.
There is no compensation mechanism for duplicate items or bad luck.
How the Probability Works
The 3% chance applies to each individual box. To understand your overall chance across multiple boxes, it is often simplest to calculate the chance of getting zero mythical items, and then subtract that value from 100%. Use the following equation:
P = 1 - (0.97^n)Where:
- P is the probability of receiving at least one mythical item.
- 0.97 is the 97% chance of not getting a mythical item from a single box.
- n is the number of boxes opened.
For example, if you open 10 boxes:
- Chance of zero mythicals: 0.97^10 ≈ 0.74 (74%)
- Chance of at least one mythical: 1 - (0.97^10) ≈ 0.26 (26%)
Examples of Overall Probability
These examples show the approximate chance of receiving at least one mythical item after opening a certain number of boxes. Opening multiple boxes improves your overall probability of receiving a mythical item, but does not impact individual probability or guarantee a specific outcome.
| Number of boxes opened | Chance of at least 1 mythical item |
| 1 | 3.0% |
| 5 | 14.1% |
| 10 | 26.3% |
| 25 | 53.3% |
| 50 | 78.2% |
| 75 | 89.8% |
| 100 | 95.2% |
| 150 | 98.96% |
| 200 | 99.77% |
(Values shown are only approximate.)