Maledict

The Maledict is a large winged monster, first seen in the final cinematic of Doom 3, then featured in Doom 3: Resurrection of Evil. This is the final transformation of the madman Dr. Betruger, and it's appearance on Doom 3 proves his sort of pact with the creatures of hell and his power above the willing of most demons in mars.

The Maledict is the large, twisted form of Dr. Betruger, with Betruger's head at the end of the creature's tongue. It serves as the final boss of RoE, launching fireballs, teleporting, and generating Forgotten Ones.

Once it is defeated, the cutscene features the Maledict biting the Marine, only to have The Artifact shoved down its throat, destroying the artifact and killing the Maledict.

Shortly after his death, Betruger's head in the Maledict's tongue talks about the artifact, revealing it is a powerful object meant to be used by forces of hell, and as speaking of the forces of hell by using the word "us" he reveales his plans of another invasion, and how these plans are ruined by the protagonist of RoE, delivering it into Betruger's head and killing the maledict.