Agreed to keeping "dire whiner" and adding a fiendish name.
Cleon said:
Disparagloth (from "Disparage" and the -loth ending some D&D fiends have?)
"-loth" is for yugoloths, but we could use "-lith" (like the marilith, bebelith, and so on).
Let's figure out ability scores so we can Homebrew this thing.
Similarly HD demons...
Hezrou: Str 21, Dex 10, Con 29, Int 14, Wis 14, Cha 18
Vrock: Str 23, Dex 15, Con 25, Int 14, Wis 16, Cha 16
Cerebrilith: Str 22, Dex 13, Con 25, Int 15, Wis 18, Cha 21
Alkilith: Str 16, Dex 25, Con 16, Int 14, Wis 17, Cha 15
The alkilith is oozlike, so since we're going with sluglike, we could borrow its Str and Con. Mental prowess should be closer to the psionic cerebrilith.
That gives us Str 16, Dex x, Con 16, Int 15, Wis 18, Cha 21
For Dex, do we want to make it sluggish, going with the hezrou's score of 10? If so, we'll need +10 natural armor to get the original AC. The alkilith has +6 natural armor, which might be a better fit. In that case, we'd need Dex 18-19, or give it some sort of deflection or insight bonus.