Maladomini

The seventh layer, Maladomini, is ruin-covered wasteland. Dead cities form a desolate urban landscape, and between them lie empty quarries, crumbling roads, slag heaps, the hollow shells of empty fortresses, and swarms of hungry flies.
The Archduke of Maladomini is Baalzebul, the Lord of Flies. A bloated fiend with the lower body of an enormous slug, Baalzebul’s form was inflicted on him by Asmodeus as punishment for wavering loyalty. Baalzebul is a miserable and degenerate monstrosity who has long conspired to usurp Asmodeus, yet has failed at every turn. He carries a curse that causes any deal made with him to lead to calamity. Asmodeus occasionally shows Baalzebul favor for reasons no other archduke can fathom, though some suspect that the Archduke of Nessus still respects the worthiness of this fallen adversary. (https://www.dndbeyond.com/sources/dmg/creating-a-multiverse#OtherPlanes)

Alternative Name(s)

Seventh Layer

Type

Dimensional plane

Location under

The Nine Hells

Owner/Ruler

Baalzebul

Ruling/Owning Rank

Archdevil

Characters in Location

• Baalzebul