Killing it will gain the invulnerability power for the Artifact. The double barrel shotgun, chaingun, plasma gun, and rocket launcher remain the best choice of weapons due to this fact. While it may be tempting to try to use the Berserk power of the Artifact to conserve ammo by punching the Hunter with the player's fists, one will find that the electric properties of the monster render it invulnerable to melee attacks - instead, damage will be dealt to the player and the Invulnerability Hunter remains unharmed. This wave cannot hit the player if he is at a higher elevation, so there are safe areas in the room that can be used to escape it. The Invulnerability Hunter's attacks include hurling an electrified plasma orb and stomping the ground to unleash an electric shockwave. When it is vulnerable to attack, use the Artifact's helltime ability, pull out the chaingun, and start firing until it becomes invulnerable. Note that this underground area was removed from the version of Resurrection of Evil that is included with Doom 3: BFG Edition. One can hide from the Hunter by running underground, but it will stomp the ground to damage the player should he be standing up. When all the coils are destroyed, the Hunter will no longer be able to retain its invulnerability.

When the remaining coils reactivate, repeat the process. Destroying the open coil will again cause a temporary shutdown, leaving the Hunter vulnerable. After this, it will absorb power from the remaining three active power coils in the room, rendering it invincible. It will be open to damage for a short period, during which it is best to utilize the power of the Artifact to maximize damage dealt. The Invulnerability Hunter starts off by drawing power from the four power coils in the room, but one immediately overloads and is destroyed, interrupting its attempt to become invulnerable - this is a clue about how to defeat the monster.

Doom 3 resurrection of evil final boss