Crucible (Doom Eternal)

The Crucible, also called the Crucible blade, is a weapon in Doom Eternal, a legendary sword which was taken up by the Doom Slayer after his empowerment by the Seraphim during the attack on Taras Nabad by the forces of Hell. He retrieves it during the course of the game in order to oppose the Icon of Sin.

Tactical analysis
The Crucible is a power weapon which executes instant glory kills against any type of demon other than the Marauder, even without the requirement that the demon be in a stagger state. Depending on the enemy attacked, the Slayer will swing the sword anywhere from one to three times, cleaving the enemy into multiple pieces and returning health as a reward. The Crucible is powered by charges which are found at fixed points on the map and can only hold three charges at a time.

Lore
It is said that immediately after his transfiguration, the Doom Slayer took the Crucible in hand and Wraithfire leapt forth from its hilt in the form of a blade. This was normally expected to only be possible for a Night Sentinel of royal blood, and thus the Doom Slayer was recognized as a secondary sovereign by the Sentinels after this event, apparently ranking just under King Novik (to whom the Slayer still demonstrates fealty in the present).

The Doom Slayer used the Crucible to attack and fell the Titan which had come to Taras Nabad. The Crucible was left stabbed into the Titan's head, as the seemingly indestructible nature of the giant demons means that they will come back to life if the blade is removed. When the Khan Maykr threatens to resurrect the Icon of Sin, the Slayer returns to Taras Nabad to retrieve the Crucible. In order to avoid awakening the Titan, he breaks the blade from the hilt. This leaves the Titan paralyzed, but requires the forging of a new blade from components left in the Slayer's vault before the Crucible can be used.