Battle Skill is a skill that exerts ability both on the field and in domestic affairs. Unlocks at every certain ranks, and its effect increases with the hero's grade.

  - Types of battle skills

   1. Tactics

     : An attack skill used by the hero during the battle in the field.

   2. Army Passive

     : Adds an additional effect during the battle in the field. When a hero with the skill is deployed, it is applied to the entire unit.

   3. Domestic Passive

     : Adds additional effects to research or construction. Applied automatically when obtaining hero with skill.