Titan (Doom)

The Titans, also known as Hell Titans, are ancient, colossal, near-invincible demonic beings.

Biology
Titans are massive humanoids, standing at heights comparable to skyscrapers. Titans bear grey skin, semi-skeletal faces, two massive horns protruding from the sides of their heads and curving upwards, other spikes protruding from their foreheads and chins, and no lips. Their legs appear somewhat goat-like, although lacking fur or hooves. Their build is visibly muscular. Titans move slowly, appearing almost sluggish, but their massive size allows them to cover great distances quickly, and their strength is incredibly high, able to smash cities, battle Sentinel Atlans, and carry fortresses on their backs. They are known to be nearly invincible, their skin being completely impervious to Earth weaponry. The only weaponry known to be able to reliably harm and kill Titans are Crucibles and Atlan armaments, and in the case of Crucibles, Titans are able to resurrect themselves if the Crucible blade is removed from their bodies. However, Atlan armaments are able to permanently kill Titans, as is an unidentified method utilized by the Doom Slayer. If used against exposed innards of Titans, such as their brain, even conventional weaponry such as rocket launchers are able to kill Titans, although not permanently. Some Titans are known to have artificially created, with different abilities. One, simply known as The Titan, was powered with the essence of demons killed by the Doom Slayer, and another, the Icon of Sin, was created from the resurrected heart of an Argenta, had the ability to summon demon hordes, was able to gain power the longer it was on Earth, and could warp reality with its very presence, able to cause entire universes to collapse into black holes and be sucked into Hell. While The Titan appears to have borne a physiology identical to that of the other Titans, the Icon of Sin had considerably more plantigrade feet with three distinct toes lacking claws, although bearing claws on its hands, and most notably, a head resembling that of a skeletal goat. It is unknown if ordinary Titans are born or created, but they all appear to have an identical physiology and lack any abilities aside from their massive strength and near-invincibility. There was once a race of cyclopedic Titans, who are now extinct, and bear some similarities to Cacodemons, implying a connection between the species, although any true connection is unknown. The sapience and general intelligence of Titans is unknown, as most Titans seen by Humans were mindlessly following all commands given to them, usually by Hell Priests, and appeared somewhat disoriented without the Priests. However, the Icon of Sin appeared to act quite independently, although it could've also been under control of the Dark Lord.