Some things finished, and some more painting progress over the last week.
First up, that which is finished
In the game, Abhoth spawns Filth tokens, which are a sort of monster, and Abhoth's spellbook is acquired, Filth prevent enemy gates from gathering power.
Ubbo-sathla is a writhing mass of flesh and hungry mouths bound by arcane powers to feed the plots of the Tcho Tcho.
That said, I have blended down to red, and then used some heavy washes & drybrushing to give better definition, but overall it still looks very pink, and characteristically repulsive, which is the point.