Very cool! having just finished a Typhus model I know how fun these nurgle guys are to paint.
A few small things. The grass on the base is a little too vibrant to fit with the scence for me. Maybe brown or bone drybrushing to tone it down might be enough.
Also, I love the purple in general, looks great, BUT i dont like it on the slide (?) of the gun. Personal taste i guess. Having said that, must emphasise i really like the purple, especially on the head!
Great work, looking forward to seeing a whole unit!