Punchdrunk Punters Punch Knife

Sap (Mastery): If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.

These beat up and well worn weapons smell as if they've spent a week at the bottom of a forgotten cask in a busy tavern. You gain a +1 bonus to attack rolls and damage rolls made with this magic weapon. Each time you deal damage to a creature, it gains one Toxin Point for 1 hour, to a maximum of 10 Toxin Points. As a Magic action, you can cause a creature you can see to take 1d8 Poison damage for each Toxin Point it has, then it loses all Toxin Points.

Proficiency: simple, punch knife Source: Ben Huffman - Pugilist (Third Party)