Codex: Chaos Daemons (2008), p75 — Gifts of Nurgle

Aura of Decay

The sheer presence of the Daemon can strike down enemy warriors with an invisible curse of death. Aura of Decay is a ranged weapon, but the Daemon may be in close combat at the time it uses it, as may the targets. When used, all enemy models within 6" of the Daemon automatically suffer a Strength 2 hit with AP- (roll to wound as normal).

Cloud of Flies

A swarm of flies envelopes the Daemon, distracting the enemy by flying into eyes, ears and mouths, and crawling under armour and clothing. Models with this Gift count as equipped with both assault grenades and defensive grenades (but receive no Strength bonus in close combat against vehicles).

Noxious Touch

The Daemon and its weapons are covered in the most lethal toxic substance, instantly infecting any flesh it touches. The Daemon's close combat attacks are poisoned, wounding on a 2+, as described in the Warhammer 40,000 rulebook.

Plaguesword

This gift from Father Nurgle is nothing more than an old rusted blade, but one that constantly secretes a lethal poisonous slime. Plague Swords are poisoned close combat weapons that wound all opponents on a 4+, as described in the Warhammer 40,000 rulebook.