Just to add in some fun tidbits to this:

If you go by one of the myths, Malacath is what was left of Trinemac after digestion. He’s the Daedric version of a Golgothan, not made of shit but born from it.

His plane of Oblivion, where his followers hope to go after death, is basically Valhalla after being reduced to ash. It’s straight up called “The Ashpit” with it’s notable features being the Great Forge and The Backbone of the Ashpit, which might be Malacath’s actual spine since Oblivion planes don’t make sense when you think about it for too long.