Plague Knife var addthis_config = {"data_track_addressbar":true};

The Plague Knife is a Chaos Space Marine weapon blessed by Nurgle. Its is capable of "blessing" anyone is touches with Nurgle's Rot. It drips with poisons and venom and is likely to kill anyone if the initial wound is insufficient. It is similar to the Plague Sword, but smaller.¹

Sources

• ¹:Codex: Chaos Space Marines (3rd Edition, 1st Codex)