Whip of Fangs

The skin of a large asp is woven into the leather of this whip. The asp's head sits nestled among the leather tassels at its tip. You gain a +1 bonus to attack and damage rolls made with this magic weapon. When you hit with an attack using this magic weapon, the target takes an extra 1d4 poison damage and must succeed on a DC 13 Constitution saving throw or be poisoned until the end of its next turn.