Pestilence looks like a whole other beastie now he's got his 'toxic' going on.
I'd originally planned to blacken the edges of the yellow flock, to show it dieing in the toxic miasma given off by the Venomthrope. I may still do it, and perhaps leave a black slime trail behind the creature. I'm not so sure how he's supposed to move, does it hop, slither, glide?
It'll be interesting to have some mobile cover, potentially a new way to play, surging the horde forwards under it's cloud of protection, should be fun.
Now, how to transport the little fella...
And the obligatory big blue tick for getting it done!