Heart of Hell

From Doom Wiki

The Hearth of Hell is a demonic device found in DOOM 3: Resurrection of Evil. The Marine found it in the Martian ruins of the former UAC Base. When the Marine touches it, it sends a Shockwave that kills everyone in his squad. The Hearth of Hell (a.k.a. artifact) opens a dimensional rift between Hell and the restored UAC Base. The Maledict (a.k.a. Dr. Betruger) knows the location of the artifact and send his 3 best Hell Hunters to chase after the Marine and destroy anything on its path.

[edit] Powers

The Hearth of Hell has 3 special powers who become avaliable only if the Hell Hunter who has the power is defeated and his soul trapped in the artifact

Power 1 : Bullet time

Power 2 : Berserk

Power 3 : Invulnerability

When you have all the 3 powers you can kill a Mancubus or a Hell knight in 1 strike.