When activated, the player is covered in shining white bands. It is possessed by all Brute Chieftains that wield Gravity Hammers unhindered, but not the Brute War Chieftains. Shooting them when it is activated is simply useless, as you cannot harm them except by performing an assassination, which, done correctly, will kill them Invincibility or not. In Campaign, it can be found on some dead Brute Chieftains that have not used the power-up, but this is a rare occurrence, as they will usually activate it the instant they are attacked. In addition to being obtainable from dead Brute Chieftains, there is an Invincibility in the level "Halo" on Easy, Normal, and Heroic difficulties. After going up the staircase, face the middle of the door, then turn around the other way and walk into the tunne