> For the complete documentation index, see [llms.txt](https://captain-tsubasa-rivals.gitbook.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://captain-tsubasa-rivals.gitbook.io/en/player-nft-and-training-functions/player-packs-3.md).

# Stadium

The following four functions can be developed in the stadium training.

Once acquired, these functions will be buffed for years to come and will have five levels.

![](/files/k04m4O7cnXv5n7fldLTv)

## Cost and Effectiveness

{% embed url="<https://docs.google.com/spreadsheets/d/1d-gUj2F3jffsEK5fPI1HLSBYt4vc1f1zFzrXmu6H1gc/edit?gid=0#gid=0>" %}

Example)

In the case of training a support character (when raising it from level 1 to level 2)

When a stand is raised to level 1, 35% + 2%pt equals 37%.

\*"Increase in mint rarity rate" means that there will be more possibility of higher rarity of unopened player packs.

**Probability of occurrence of packs with mint rarity increase**

The specific probabilities are as follows, using the 1% rarity increase rate as an example.

{% embed url="<https://docs.google.com/spreadsheets/d/1SzixTCUSiM_YQnLuLJb27Rb5k-nrE7xgh-Qad50b8ME/edit?gid=0#gid=0>" %}