The Plague Planet is the corrupt heartland of the Death Guard within the Eye of Terror, a world drowned in decay and consecrated to the pestilent will of the Plague God. Its swamps steam with contagion, its forests weep sap the colour of infection, and its skies swarm with fat, buzzing flies that carry blessings of rot to every corner of the surface. Here disease is not suffering but sacrament, and the endless cycle of putrefaction is worshipped as the truest expression of life eternal.
At the world's heart squats the Plague Garden made manifest, a mockery of a paradise where the followers of Nurgle labour over cauldrons of festering brew, cultivating new contagions with the tender care of gardeners tending prized blooms. The bloated warriors of the Death Guard, their armour split by the swollen flesh beneath, move without haste through this reeking domain, for they have no fear of death that could touch them. They have already died a thousand times and been remade in corruption.
Ruled in the name of the daemon primarch Mortarion, the Plague Planet is a place of grotesque and horrible peace. There is no starvation here, for the rot itself sustains all, and no despair, for the plague-brethren find joy in their afflictions. It is a paradise of pestilence, generous and eternal, offering to all who dwell there the ghastly gift of a life that will never, ever end.