Poison Knife is a projectile Item in Bloodborne.

poison_knife.jpg "A knife slathered in poison.

This curved knife is as thin and sharp as a surgeon's blade. Often used for self-defense by special doctors in the Healing Church.

They say that hunters traditionally avoid the use of poison, likely because the poison is too slow to act in the heat of the hunt."


Poison Knife Usage

  • Throw at enemies to cause physical damage and add slow poison effect.







  • Duration of the slow poison effect is 40 seconds.
  • The damage done by poison might be based on total HP, poison resistance or something else. (needs confirmation)
    • Against various enemies it resulted in 12, 13, 14 or 15 HP drained each second.
  • The daggers can briefly stagger most smaller enemies, making it easier to keep throwing them until the target is poisoned. Relatively effective on NPC hunters (mostly on the Cainhurst Hunter at the end of Eileen's questline).


Trivia goes here

    • Anonymous

      Also found them05 Jul 2016 14:39  

      In a lower hinter tomb dungeon. A bath was behind a door selling them even though I didn't have the badge.

      • Anonymous

        Alright05 Jul 2016 14:39  

        They actually do some damage but are useless against actual players in pvp. If they have an antidote which is really common, landing 3 hits with a knife is really not worth the risk for dealing another 5 damage with poison. Use them on NPC hunters instead they absolutely make the toughest fights a breeze

        • Anonymous

          prices05 Jul 2016 14:39  

          how did people find out the prices for these before beating rom/entering cathedral ward? to GET the eye watcher badge you need to get to Yahar'Gul, which is acessible after beating rom only (I don't mean the Hypogeum Gaol, you cant get upper cathedral ward key there).

          • Anonymous

            Purchase without Cosmic Eye Watcher05 Jul 2016 14:39  

            I was able to purchase these for 1900 echoes or so in the third layer of Lower Hintertomb <br/>Same Bath messenger from which the Sinister Hintertomb Root Chalice is aquired

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