The battleground menu can be opened through the "B" button in-game by default.
There are four duel channels at this time:
- Beginner's — suggested Novice ~ 8th Cadet
- Intermediate — suggested 7th Cadet ~ 5th Cadet
- Advanced — suggested 4th Cadet ~ 1st Hero
- Free — suggested Novice ~ 1st Hero
Wins and loses will not be counted in the Free Battleground.