The Poison Staff is one of the more common staves. When using its the secondary function (right-clicking) it will apply Poison II to the highlighted target for a full 15 seconds, dealing 25 damage (12.5 Hearts) over the course of the duration. The activation of this ability costs only one durability point. It is possible to poison a hostile mob outside of their aggro range, making combat with stronger mobs like Walker Bosses or Pirate Bosses extremely easy.
This staff can be found as mid- to high-tier dungeon loot.