Most suspicious deaths and acts of espionage in Skaven society are blamed on the nefarious Clan Eshin. Such accusations are probably true, but, of course, there is no evidence. Much of this devastation is wrought by the Gutter Runners, Clan Eshin's black-clad death squads. Gutter Runners have undergone training in the mysterious fighting style developed in the Far East. Because of their ability to bend and contort their pliable bodies with a speed and dexterity unachievable by man, Gutter Runners have no need for encumbering armour - they simply dodge the blows and missile of their foes. A unit is often led by a Death Runner - the term used for the most promising assassin-adept.
By vanguard deploying gutter runners in hidden positions on the flanks of the enemy army, you can use them to draw attention and deal damage to enemy units before your armies meet. Gutter runners can outrun any other infantry and do chip damage to enemies with their attack while moving before disappearing with their stalk ability. Look for moments to surround isolated units and exploit the Gutter runners decent melee combat skills, and disengage before reinforcements arrive. Look for an opportunity to strike enemy artillery. Beware of enemy missile units and light cavalry which can catch up to them.