I know it’s mostly because the model was made around the same time they were planning to axe fantasy and kept it around to prevent pissing off the people who bought the Monstrous Arcanum line, not to mention they haven’t really been mentioned since that one Audio Drama but I absolutely love how Mournguls still exist even within the Mortal Realms.
Despite the Winds of Magic being transformed into several realms and kind of dividing apart from each other their very essence still somehow coalesces to create these things as if they’re some kind of unavoidable cost to magic persisting.
Like some kind of laws of magic dictate that where there is the eight lores there will be Mournguls created from the souls of cannibals.
The last Mourngul will cease to exist once the Mortal Realms and, in a sense, all of reality falls like some kind of fucked up magical zombie ghost cannibal tardigrade thing.
I love them so fucking much and hope they get more of the spotlight that they deserve.