Invincibility

Invincibility is a piece of equipment featured in Halo 3.

It confers the user with a brief period of invulnerability, functionally and aesthetically similar to Tartarus's energy shield. It is known to be possessed by some or all Brute Chieftains in Halo 3, giving chieftains a brief period of time where they may chase after the player with the Gravity Hammer unhindered, giving them a significant tactical advantage. It is also present in multiplayer, although its appearances will be infrequent, since the powerup will be too "cheap" for some players.

In campaign, it can be found on some dead brute chieftains if it hasn't used the powerup yet.