Necrotique:
Well, for once I have a completed conversion for you (still unpainted)
I’ve done some heavy conversion using various kits to create my interpretation of Throgg. In the WOC book they state he wears a “filth-encrusted, spiked crown”, which I have tried to include.
Also, though most people show him as a river-troll, I’ve tried to make mine look like a heavily mutated stone-troll.
In the picture in the army book, he has the tusks which I’ve included and a mouth on his stomach, which I’ve sculpted from GS. Sure, it isn’t excactly the same as the mouth in the WOC army book, but to be fair, he is a heavily mutated troll, and as such can change form ad lib.
This will be part of my nurgle-themed army, but he will be more of an ally than a follow of Nurgle proper. For that I will have my bile trolls, led by my next conversion task- Raak Stoneshatter. The background for him is outlined here
Sorry about the quality of the photos - had to use my webcam so it looks terrible. Will upload painted ones sometime soon though, in glorious 10MP images haha 
Let me know what you think about my interpretation.
:cheers
[attachment=2621][attachment=2622][attachment=2623]
The Axe was scratch-built from various sprue parts and GS. I chose a double-sided axe as he could have attained such a weapon from Chaos Dwarfs or forced a Dwarf to forge it, as it is much bigger than a weapon designed for humans. In the army book it says “picks his teeth with a gem-encrusted blade”, showing he has little to no value for petty human weapons or valuables.
[attachment=2624][attachment=2625][attachment=2626]
As I tried to show in the below photo, he stands over twice as tall as a Chaos Warrior, and about half as much as a normal troll. Extensive work was done to the legs to make him stand in a natural pose.