A Plaguesword is a Daemon Weapon of Nurgle. Each Plaguebearer, the Lesser Daemons of the Plague God, carries a gnarled and spike-ridden blade -- an infamous Plaguesword. Although corroded and battered, these blades drip with a coating of loathsome slime whose touch brings disease and death.
As Grandfather Nurgle enjoys each of the wide variety of splendid aliments at his command, there is no telling exactly what might be contracted from a scratch suffered from a Plaguesword. Victims not slain outright have been known to come down with all manner of gruesome and deadly maladies.
- Codex: Chaos Daemons (8th Edition), pp. 58, 105
- Codex: Heretic Astartes - Death Guard (8th Edition), pp. 52, 77