18,613 Pages

For the story variant, see Offensive Security Unit (story).

Offensive Security Units are enemies in Xenoblade Chronicles. They are Mechon, and can be found at level 56 at Connecting Bridge on the Fallen Arm. They can drop the Refined Part Ms needed for Restoring the Capital 2.

Two Story Exclusive variants appear at level 52 at Power Pipe Ruins on the Fallen Arm. They must be defeated by Sharla and Reyn as part of a story event not long after the party arrives on the Fallen Arm. This variant does not carry or drop any treasure.



Art Attribute Multiplier Hits Range Effect Knockback Blowdown/Daze
Boost OneStatus---Strength Up--
Boost ThreeStatus---Strength Up--
DelayalStatus--Circle around casterSlow
Ether Down
Shield BashPhysical3.3 – 3.51-Daze--

† It has not yet been confirmed whether this enemy uses Boost One, Boost Three, Delayal and Shield Bash.


Break 70% Lock-On 0% Physical Def. ▼ 0% Agility ▼ 70%
Topple 0% Bind 70% Ether Def. ▼ 0% Aura Seal 0%
Daze 0% Paralysis 0% Strength ▼ 70% Arts Seal 70%
Sleep 70% Slow 0% Ether ▼ 70% Death 0%



Wood 77.6%
Silver 19.4%
Gold 3%

Wood chests will contain 1 or 2 items from the "Wood" table.
Silver chests will contain 2 items from the "Silver" table and 1 from the "Wood" table.
Gold chests will contain 2 items from the "Gold" table, and 1 from each of the "Silver" and "Wood" tables.


Refined Part M 73.7%
Quality Jet 26.3%


Phys Def Down IV Electric 31.3%
Initial Tension IV Fire 31.3%
Prosperity Biter 1 slot 8%
Wolf Guarder 2 slots 1.9%
Draft Rifle 2 slots 1.6%
Cerasus Cutlass 2 slots 1.1%
Amethyst Boots 1 slot 16%
Brave Gloves 1 slot 3.7%
Stellar Gauntlets 1 slot 3.1%
Orion Bottoms 0 slots 2.1%


Jumbo Guarder 1 slot 8.8%
Jumbo Guarder 2 slots 7.3%
Snaer Striker 2 slots 4.9%
Unique Weapons
Century Staff 18%
Dividing Line 3%
Unique Armours
Inferno Armour 22%
Earth Boots 18.3%
Blade Boots 12.3%
Advanced Art Books
Play Dead Riki 2.4%
Anchor Chain Reyn 1.6%
Gale Slash Dunban 0.9%
Double Wind Fiora 0.4%
Community content is available under CC-BY-SA unless otherwise noted.