The Invulnerability Hunter is a boss monster found in Doom 3: Resurrection of Evil. It is the final Hunter the player will encounter. Like the Berserk Hunter, the Invulnerability Hunter is noticeably larger than a Hell Knight, and has a bulging, extremely muscular body with a blue aura surrounding it. When it is vulnerable to attack use the artifact's helltime ability and pull out the chaingun and start firing until he becomes invulnerable. Then, in its invulnerability state, it will attack the player by shooting energy balls and electric shockwaves.