Each type of hero has 5 different types of skills.

1. You can check the detailed information of one skill from the five skills. 

2. You can check the skill level/ skill name/ skill information.

3. You can check the information by skill level.

4. You can use the gold and same grade of hero (or skill level up hero) as materials of skill level up.

1) While skill level is up, the level of all skills that can be leveled up for the hero is increased at once. 

2) The number of skills which able to level up is determined by the hero's original grade

 - N: 2 skills are able to level up 

 - R: 3 skills are able to level up 

 - SR: 4 skills are able to level up 

 - SSR: 5 skills are able to level up 

※The number of skills that can be leveled up is not increased by evolution.