Codex: Chaos Daemons (2008), p8 — The Great Game

When Nurgle's minions are set free, they march forth to spread disease and decay. Sonorous chanting and the rusted clangs of a thousand bells herald their attacks, while the army advances under an impenetrable swarm of flies. The noxious poxes and pestilence of the Great Unclean Ones kill everything in their path, rendering it down to a mulch from which evil-smelling fungi and plants erupt.