The 4th Hell Guard (Patreon)

"Thank to the sin of lust. It survive the Doom Slayer's slaughter."

Hell Guard is a powerful denizens of Hell  who slayer must be defeated in order to acquire the Crucible. They are a sort of biological mech, only given life when controlled by a diminutive parasite. -  https://doom.fandom.com/wiki/Parasite

Somehow. There have 3 lewd versions of this thing. No matter how disturb it might be...It can be found early for $10 patrons.  https://www.patreon.com/posts/dark-side-of-14972794