Invulnerability

The Invulnerability is a power-up that temporarily absorbs all damage a player may take.

Unreal Tournament 3
"The Phayder corporation recently developed this prototype armor, which uses a modulated nanoblack shield to absorb any attack. These devices consume immense amounts of power, and last for onlyx a limited time, else the Phayder would already rule the known galaxy."

- UT3 manual

This power-up makes a player absolutely immune to any kind of damage. There are only two ways to successfully deal with a player using this power-up, either running away or landing a hit with the Impact Hammer's EMP mode to steal the Invulnerability power-up.

Picking up the Invulnerability while already carrying Damage Amp or Berserk or picking up any of those power-ups while already carrying the Invulnerability gives the user a "Juggernaut" award.