Tyrant

The Tyrant is a new monster in Doom Eternal, and the next iteration in the class of cyberdemons. It bears a close resemblance to the classic cyberdemon, with a similar suite of cybernetics, a gored abdomen, and a weapon which replaces its left arm. Unlike its Doom II counterpart, its eyes are not red; instead, they are yellowish-white.

As of the pre-order trailer, the Tyrant has been confirmed to be a recurring major enemy, unlike its previous iteration.

Glory kills

 * The Doom Slayer repeatedly stabs the Tyrant in the eye, causing it to crash to the ground.
 * The Doom Slayer uses the Doom blade to cut the Tyrant's leg off. Once it falls to its knees, he beheads it.

Trivia
Despite appearing seemingly organic, the Tyrant's skull can be exposed to reveal a mechanical eye with a red lens.