Cursed Plague Bell
From Warhammer 40k - Lexicanum
Cursed Plague Bells are a type of Death Guard Plague Weapon carried on the backs of Noxious Blightbringers.[1a]
Every ring of these bells sends splinters of madness into all enemies which hear it and leeches their mortality, all while further empowering the endurance of nearby Death Guard.[1a]