The task of cataloguing the potency of Nurgle's many diseases falls to Epidemius, the Lord of Decay's chosen Tallyman.
It is a never-ending task, for Nurgle is constantly creative and his anarchic hordes are ever keen to spread new and wonderful diseases.
Nurgle's diseases afflict souls as well as bodies, destroying a being's sense of self and moral direction as thoroughly as they ravage the flesh.
Epidemius can track the crumbling soul trail of the recently slain, gleaning all manner of knowledge from it, as well as siphoning a portion of the spirit's strength to aid his master's cause. As an offer of thanks, Epidemius' entourage strike bells, the doleful sound celebrating as the spirit leaves for Nurgle's welcoming embrace.
Epidemius can be found wherever Nurgle's pestilent gifts are most bountiful. His corpulent frame -- resembling that of an extremely bloated Plaguebearer -- is often seen upon the battlefields of realspace, for infected injuries and fresh corpses are fecund breeding grounds for contagion, and the stench attracts Epidemius like a fly to a rotten wound.
Amidst the raging conflict, Epidemius surveys the spread of filth and decay from his lofty perch, taking careful note of every bubo, pustule and sore.
Even as Epidemius writes, Grandfather Nurgle becomes aware of his findings, distilling the information for future experiments and brews. The more notes Epidemius makes, the more the Lord of Decay's attention is drawn to him, and the greater the blessings bestowed upon his pestilent legions.
To better observe the spread of disease, Epidemius orders his palanquin carried to the front lines, where the Nurgling bearers and the obese Herald angrily strike out at any foes that get close enough to disturb the Tallyman's work.
- Attendants' claws and teeth
- Codex: Chaos Daemons (8th Edition), pp. 56, 97