# Cost: Energy
### RIVAL Mode Costs
Playing the RIVAL mode consumes the User's Energy. The game cannot be played if Energy is insufficient.
The Physical Condition of the player used for the game will be bad. The decrease rate depends on the stage you are playing.\
\
Please see [Physical Condition/Refresh](/en/player-nft-and-training-functions/physical-condition-refresh.md) for details.
{% hint style="success" %}
#### Energy Recovery
* To challenge a stage in RIVAL Mode, you must expend Energy, and if you are low on Energy, you will not be able to play the game.
* The maximum amount of Energy is determined by the total number of Players the User holds.
* Energy recovers 25% of its maximum value every 6 hours (0:00, 6:00, 12:00, 18:00 SG T UTC+8).
{% endhint %}
| Total # of Players | Max Energy |
|---|
| 1~2 | 2 |
| 3~8 | 4 |
| 9~14 | 9 |
| 15~29 | 15 |
| 30 | 21 |
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