Archer units can attack both air and ground units. They are valuable support units as you are able to upgrade them with the ability to cast an offensive spell, or heal your troops during combat. They are better suited for ranged combat, but when an enemy unit attacks them in close combat, they will pull out their sword and fight.
Archers attack with normal swords, arrows, and powerful fire arrows. When entangled in ranged combat, archers can not use their brains.