This expansion for S.H.E.O.L. adds: 1. A new character, The Wrench, who can deploy powerful drones to ambush the Shadows and help allies with her repair skills. 2. Patrolling Mechs,which are a new type of unit representing the mechs that protect the perimeter of the Citadel (and certain other human outposts), providing new actions during the scout phase. 3. A new herald, the Skin Rider. This herald is a massive shadow that has taken control of a combat mech and its unfortunate pilot. The firepower of the mech adds to the power of the shadow itself, and the Scouts will have to work hard to bring it down!