The Archer is a playable unit, trained through the Shooting Range.
The Archer is a long ranged unit with an attack range of 5, meaning they can be placed between Skeleton Mages and either Ninjas, Ghost Assassins or Mages. They are fairly fast attacking units, peppering their enemies with arrows.
However, due to their rather bland trait and role, unevolved Archers are not recommended outside of raiding purposes.
When the player reaches level 42, they may evolve Archers into Sky Archers. Sky Archers gain a significant boost over their unevolved counterparts; they learn the Sky Arrow ability, where their attacks have a chance of piercing an entire row of enemies. The attack deals damage based on the struck units' health. Against 2x2 or larger units, the piercing arrows strike a random row behind the large unit.
This makes them rather useful for stages where the enemy has a lot of health, which is almost always the case in The Seal, Crusade and Revenge depending on the stage's formation. They may also be used as such in PvP, but only against units with an attack range of 4 or less as other units can cause problems due to their greater range and ability to quickly retaliate.
With the technology "Recruitment Speed" at Level 5, Archers train at 50 seconds.