Skills
As your units level up, they will gain skill points. Spend skill points to unlock different class skills in the Barracks.
Active Skills
Active Skills are added to the unit’s action bar as a button. Each Active Skill has an Action cost and a Cooldown value. To activate an Active Skill, click on the button or press the associated hotkey.
Cooldown
The Cooldown value of an Ability or Skill is the number of turns you have to wait before activating that Ability or Skill again.
Passive Skills
Passive Skills are “always on” and do not need to be activated.