Great Unclean Ones are the mightiest daemons of the Plague God, vast tuns of rotting flesh in which the Grandfather's own jollity is made manifest. Each is a walking garden of disease, split-bellied and buzzing, loops of entrail dragging fresh maladies across the ground, their broad faces fixed in a beaming, avuncular grin. They wade into war with the unhurried delight of a doting uncle come to spoil his grandchildren, ladling out poxes as though they were sweets.
Despite their bulk they are neither slow of wit nor of will. A Great Unclean One is general, priest, and proud craftsman of contagion all at once, forever blending new rots to share with friend and foe alike. One rotten fist hefts a bileblade or plague flail; the other cradles bell and censer to toll the Grandfather's hymns. Cut one down and it dies chuckling, certain its burst corpse will seed a hundred fresh sicknesses — a last, generous joke at the victor's expense.