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.

Greatsword +2

Rare

Source: DDEP07-02 Drums of the Dead - Fai Chen (traded from Riorce Raov)