You can clear levels in Campaign to acquire commander experience, gold and fragments.

1. After completing the final level of this chapter, you auto-battle in this chapter. 

2. Auto-battles can see you obtain relative rewards. 

3. Auto-battles will continue even if the game is closed. 

4. Single auto-battles have a time limit of 8 hours. After 8 hours, there will be no further opportunity for income. Income required to be received manually. 

5. Use Accelerating Blueprints accelerate auto-battles can see you immediately receive the rewards of completing a two hour battle.

6. Set Auto-battle team in campaign to earn hero exps for heroes in the team you set.