The Offensive Security Unit along with the Offensive Seeker Unit attack Shulk alone once the M83 Predator Unit and the two M54 Slayer Unit are defeated. They must be defeated by Sharla and Reyn joining Shulk. This variant does not carry or drop any treasure. There is a normal variant at level 56 on the Fallen Arm. These Mechon can be found on the Connecting Bridge.