You can check the class exchange levels and rewards in-game menu at the top right corner-Class List.

When you reach the required class exchange level, a class change quest will be triggered,

By completing the quest, you can exchange your class and obtain the corresponding tier.

■ Class Exchange Levels and Rewards

- Level 10: Uncommon Class

- Level 30: Rare Class

- Level 60: Epic Class

- Level 80: Legendary Class

※ You can view the available classes in the Class Change tab within the Class menu.