A censer consecrated to the Horned Rat and filled with lethal burning warpstone is used as a weapon by its crazed bearers (it counts as a flail). In addition, when the censer is swung around violently it creates a deadly cloud of warpstone vapours. If the bearer is in base contact with an enemy at the beginning of the Close Combat phase (both the Skaven player's and the enemy's), all models in base contact with one or more models armed with a censer must take a Toughness test, as should the bearer himself. If the test is failed, the victim suffers 1 wound with no armour save. All Clan Pestilens Skaven and models with the Mark of Nurgle fail the test only on a roll of 6. The wounds caused by the gas are resolved before impact hits but after Assassins are revealed and challenged models are moved.

Wounds caused by the gas count for combat resolution. Models killed by the gas are close combat casualties and therefore don't get to fight back.

A plague censer is a Warpstone Weapon.