Blight Grenade

A Blight Grenade, also known as a Death-heads of Nurgle, are highly effective improvised grenades utilised Plague Marines and other followers of Nurgle. Each is made from the head of a conquered enemy. The more powerful the enemy the better, so enemy champions are highly prized. The head is sealed with wax and then filled with infectious blood, pus, acid and other putrid creations and allowed to rot down. The result is a missile which will burst upon impact, the internal pressure throwing out infectious liquids and gases in all directions.

Background
The Death Guard Traitor Legion long ago perfected the grisly practice of using their enemies' decapitated heads as crude grenades. Bloated and swollen with disease, the Plague Marines long to share their pathogens with those who are hale and hearty. Cultivating these contagions into explosive devices designed to wound and infect over a large area, blight grenades expose those who are injured by the corrupted pieces of plague-ridden shrapnel to the most deadly of toxins. These contain virulent toxins that eat away at armour and fill the air with thick clouds of blinding spores. The most ostentatious blight grenades are "death's heads" made from the severed heads of fallen enemies, each filled to the brim with a cocktail of disease before being sealed with ancient wax. The contagions released by blight grenades can penetrate cracks in armour, cause flesh to boil and slough away, and fill the air with blinding spores, all the while keeping the victim alive until the very end, so they can better enjoy the gifts of the Lord of Decay. Some versions of Blight Grenades resemble maggot-filled shrunken heads.