This incredible Nurgle fortress was on display at Warhammer World.
It includes this Great Unclean One. They are the Greater Daemons of Nurgle. In form they are massive and bloated with disease and decay, and their necrotic and boil-covered flesh is rent, where their organs spill out, hanging across their huge girth.
Great Unclean Ones can endure tremendous amounts of damage before being felled. Many opponents cannot stomach to look at a Great Unclean One, let alone fight one.