Dagger of Venom

Rare

You gain a +1 bonus to attack and damage rolls made with this magic weapon. You can use an action to cause thick, black poison to coat the blade. The poison remains for 1 minute or until an attack using this weapon hits a creature. That creature must succeed on a DC 15 Constitution saving throw or take 2d10 poison damage and become poisoned for 1 minute. The dagger can’t be used this way again until the next dawn. The pommel of this wicked looking dagger looks like a black viper with a forked blade worked to resemble the tongue. This item can be found in the Dungeon Master’s Guide.

Periapt of Proof against Poison

Rare

Originally owned by Антон Палихов's character Palant (DCI 2203786969), who got it in Acererak's tomb.