There are four Grades of Costume: Normal, Rare, Epic and Legend.
You can open a Costume's new ability by promoting the Costume.
Whenever you promote a costume, the abilities are remodeled.
■ Costume Promotion
① You can check the [Costume Promote Stone] required for promotion.
- You need 'Costume Promote Stones' for the Costume promotion, and you can obtain it by summoning a costume and Event reward.
② You can check the information about promotion.
③ Proceed with the promotion by using Gold. (100% chance to get a promotion)
④ When your Costume promotion is successful, it will open the Costume's new ability.
※ The guide was produced in a separate test environment.
So, It may change depending on the update and development situation.
Thank you for your love and interest in the Devil Book~
Devil Book Team