Source: Warhammer Armies Project: Unofficial 9th Edition

Rod of Corruption (Skaven)
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Magic Weapon

The Rod of Corruption is a dreadful staff of spiderwood, iron-capped with spikes and covered in writhing runes of power. Many censers hang from its chains, wafting foul vapours. It seethes with the foul energies of pestilence and corruption, and for any creature other than Lord Skrolk to wield it would mean certain death.

Plague Censer. Models hit by the rod must pass a single Toughness test (regardless of the number of hits) or instantly decay and die with no saves of any kind allowed. If the victim passes the Toughness test, roll To Wound as normal.