Sentinel Wolf

Sentinel Wolves, also known as simply Wolves, are a canine species native to Argent D'Nur, who are loyal war beasts serving both Night Sentinels and Marauders, capable of manifesting themselves long after death.

Biology
Little is known of what Sentinel Wolves were like when they were living beings, although it is known that they were canines who bore a great resemblance to a Terran wolf, although based on the visage of their spectral manifestations, they appeared to have flatter or no fur. They are very loyal, even after death. They are capable of manifesting themselves as green spirits, still able to howl and seemingly teleport, or at least turn invisible while moving. As ghosts, they can power certain devices by jumping into them, and create a bubble of breathable, hospitable atmosphere while the surrounding area is overtaken with toxins. While they are incorporeal, Sentinel Wolves that are corrupted by Hell take on an orange hue and are able to physically attack enemies by biting them, and can also be destroyed by kinetic force. They are known to be related to other wolf-like species on Argent D'Nur, and are known to be the strongest and fastest among them.

History
The origin of the wolves is unknown, as the Night Sentinels never publicly shared their origin, making it ambiguous if they were created by the Wraithcall of the Elemental Wraiths. Like Wintherins, they were tamed by the Argenta and assigned to hardened Night Sentinels as companions and war beasts, bred as warriors in their own right. The Argenta served a race of extradimensional beings known as Maykrs, who acted as their "gods" in the war against the demons of Hell, and the wolves were the loyal companions of the Sentinels throughout the war. However, the Maykrs eventually betrayed the Argenta in exchange for immortality-granting Argent Energy, allowing the demons to conquer Argent D'Nur and partially absorb it into Hell. Before the fall of Argent D'Nur, there was a civil war between Sentinels loyal to the Doom Slayer, an unnamed Human who had risen to the heir to the Argenta throne, and the Sentinels loyal to the Maykrs. Wolves appear to have also been split in the conflict. The Sentinels who were loyal to the Maykrs fell, and were resurrected as demons known as Marauders. Marauders kept their wolves, who were also resurrected as spectral manifestations. A few wolves still loyal to the true Sentinels were also able to manifest themselves as spirits after the fall of Argent D'Nur, with the race of Sentinel Wolves appearing to be extinct. Eons later, the Doom Slayer returned to Argent D'Nur, being guided by a wolf to the chamber of King Novik, who also manifested as a ghost. When the Slayer went to rescue Samuel Hayden, the Human form of a Maykr Seraph who had granted the Doom Slayer incredible power, from the ARC Complex on Earth as it was assaulted by demons, a Marauder appeared to attack the Slayer, with his own spectral wolf, but both the wolf and Marauder fell before the Slayer. More Marauders attacked the Slayer at certain points in his journey to destroy the Hell Priests commanding the demonic invasion of Earth, utilizing their wolves, but were all killed by the Slayer. When the Slayer retrieved the Dark Lord Davoth's life sphere to revive and kill him, he was guided at certain points by a Sentinel Wolf, who protected him from toxins that engulfed the area before demon swarms appeared. After reviving Davoth, the Slayer ventured to the Hell city of Immora to kill him for good, guided in Argent D'Nur by a Sentinel Wolf as he sought a power source for the portal to Immora. In Immora, Davoth summoned corrupted spectral wolves to his aid as he battled against the Slayer, but the wolves were destroyed, as was Davoth. The true final fate of the wolves remains unknown.

Appearances

 * Doom Eternal (2020)
 * Doom Eternal: The Ancient Gods Part 1 (2020)
 * Doom Eternal: The Ancient Gods Part 2 (2021)