Archers

Roadside robbers with a bow and arrows - that's what hidden archers are.

Description
These criminals wait silently in trees or other cover for their victims to appear, and once they have a clear line of sight, a well-placed arrow ends the victim's life. Should an archer be spotted, he is easily overcome in melee, because he has no way to defend himself. While in the Age of Darkness they hid so well they couldn't be spotted until it was too late, that was no longer the case in further ages.

Archers usually wait for victims in the forests.