Warhammer Fantasy Roleplay (1st ed, 1986), p318 — Nurgle's Rot

Nurgle's Rot, or The Rot, is a strange disease. It seeks to turn its victim into one of Nurgle's Plague Bearing Demons. Unfortunately, the mortal form cannot take this tortuous metamorphosis, and must eventually perish under the strain. Only Champions and Beastmen of Nurgle are immune to its effects, serving only as carriers.

Victims gradually mutate until their characteristics are identical to those of a Plague Bearer, at the rate of 1 or 10 points (as appropriate for the affected characteristic) per month. Select the affected characteristic randomly each game month. The profile for a Plague Bearer is as follows:

Plague Bearer

M	WS	BS	S	T	W	I	A	Dex	Ld	Int	Cl	WP	Fel
4	57	0	3	4	13	60	2	29	0	0	0	0	0

As well as the characteristic changes, certain other physical changes take place, as follows:

After 1 month	Skin turns pale yellow/brown
After 2 months	Green blotches appear
After 3 months	Skin begins to rot, attracting flies
After 4 months	A single horn begins to grow from the forehead
After 5 months	Horn fully grown, eyes begin to move together, nose atrophies
After 6 months	Eyes merge into single great eye, feet turn to three-clawed hooves
After 7 months	Face dissolves in a horror of melting flesh
After 8 months	The victim dies

There is no known cure for this disease. It can only be contracted from a Beast of Nurgle.